Cooler Master MasterBox Q300L Mini-Tower Case with window, White

The Cooler Master MasterBox Q300L is a mini tower case designed for Micro-ATX and Mini-ITX builds that require a compact footprint and high airflow potential. Its design is characterized by patterned magnetic dust filters on the front and top panels, which are removable for simplified maintenance. A key functional element is the movable I/O panel, which can be positioned in multiple locations. This allows the chassis to be configured for vertical or horizontal orientation, adapting to various desk layouts while maintaining port access.

Internally, the chassis accommodates CPU coolers up to 159 mm in height and power supplies up to 160 mm long. The case includes one pre-installed 120 mm rear fan and has mounts for additional fans at the front, top, and bottom. For liquid cooling, it supports a 240 mm radiator in the front and a 120 mm radiator in the rear. An edge-to-edge acrylic side panel provides an unobstructed view of the internal components.

• Supports Micro-ATX and Mini-ITX motherboards
• Measures 230 x 381 x 387 mm (W x H x D)
• Constructed from a steel frame and plastic panels
• Front panel I/O includes two USB 3.2 Gen 1 ports and audio jacks
• Provides four rear expansion slots
• Accommodates one 3.5-inch and two 2.5-inch storage drives
• Supports standard ATX PS/2 power supplies
• Includes removable magnetic dust filters for the front and top