Chieftec UNI Series BW-01B-OP is a mid-tower chassis designed for custom desktop builds that balance expandability and cooling. The case accommodates ATX, microATX, and Mini-ATX motherboards while providing space for long graphics cards up to 310 mm and tall CPU coolers up to 157 mm to support a wide range of component choices. Multiple fan mounts and support for 240 mm or 360 mm radiators enable flexible cooling configurations, and the included rear 120 mm fan helps establish baseline airflow out of the box. Storage needs are addressed with ten internal drive bays, including dedicated 2.5 inch and 3.5 inch locations, and two front-accessible 5.25 inch bays offer optical drive or front-panel expansion options. The front panel delivers convenient connectivity with USB 3.0, USB-C, and audio/microphone jacks, and the 0.6 mm SGCC steel construction provides a sturdy platform for a reliable system build; a power supply is not included, and units up to 160 mm in length are supported.