Cooler Master MCB-Q300L-KANN-S00

Overview

The Cooler Master MCB-Q300L-KANN-S00 is a mini tower case designed to provide a flexible and efficient solution for compact PC builds. It supports Micro-ATX and Mini-ITX motherboards, accommodating graphics cards up to 14.2 inches long and CPU coolers up to 6.2 inches tall. This case balances space-saving design with component compatibility, making it suitable for gaming rigs, workstations, or general-purpose computers.

Featuring an edge-to-edge transparent acrylic side panel, it allows you to showcase your hardware and lighting effects clearly. The case includes magnetic dust filters on the front, top, and bottom to keep your system clean, while its fully ventilated design and pre-installed 120 mm rear fan ensure effective cooling. Storage options include room for one 3.5-inch hard drive and two 2.5-inch solid-state drives, with cable management space to maintain a neat interior.

Key features

• Supports both Micro-ATX and Mini-ITX motherboards, offering flexibility for various build sizes.
• Edge-to-edge transparent acrylic side panel highlights your components and RGB lighting.
• Magnetic dust filters on all sides help prevent dust buildup and simplify cleaning.
• Fully ventilated design with a pre-installed 120 mm rear fan promotes efficient airflow to keep components cool.
• Adjustable I/O panel with two USB 3.0 ports and audio jacks can be positioned for convenient access in vertical or horizontal setups.
• Space for one 3.5-inch HDD and two 2.5-inch SSDs allows a balance between storage capacity and speed.
• 1.1 inches of hidden cable routing space helps maintain a tidy interior, improving airflow and overall aesthetics.
• Compatible with ATX power supplies up to 6.3 inches deep, supporting a wide range of power options.

Key specs

• Motherboard support: Micro-ATX, Mini-ITX
• GPU clearance: up to 14.2 inches (360 mm)
• CPU cooler clearance: up to 6.2 inches (159 mm)
• Pre-installed fan: 1 x 120 mm rear fan
• Storage bays: 1 x 3.5-inch HDD, 2 x 2.5-inch SSD
• Cable management space: 1.1 inches
• Power supply compatibility: ATX up to 6.3 inches (160 mm)

Connectivity and compatibility

The case’s adjustable I/O panel includes two USB 3.0 ports and audio jacks, providing easy access to essential connections whether the case is positioned vertically or horizontally. This flexibility supports a variety of desktop setups and user preferences, making it easier to connect peripherals and audio devices without reaching behind the case.

Cooling and airflow design

The fully ventilated chassis combined with magnetic dust filters on the front, top, and bottom ensures that air flows freely through the system while keeping dust out. The pre-installed 120 mm rear fan helps exhaust hot air efficiently, and there are multiple mounting points for additional fans or radiators, allowing you to customize cooling based on your components and workload.

Ideal uses and environments

This mini tower case fits well in environments where space is limited but component performance cannot be compromised. It is a strong choice for users building compact gaming PCs, home office workstations, or general-purpose computers that require good airflow and easy maintenance. Its design also appeals to enthusiasts who want to display their hardware clearly while keeping the interior organized and cool.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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