ITX case (compatible with P1 and A1), ITX motherboard, ATX power supply, dual-slot graphics card

An ITX chassis accommodating an ITX motherboard (with a top-down cooler), an ATX power supply, and requiring a 25cm dual-slot graphics card extender for a dual-slot graphics card (under 285mm). A 2.5-inch hard drive can be installed in the center. At least 50 M3*4*5 brass heat-pressed nuts are needed, along with M3 screws of lengths 5, 8, 13, and 15mm (add extra as needed). The external large fan is a 20mm Great Wall computer fan (the included screws may not fit; use brass nuts pressed into the existing screw holes). A 20cm universal mesh (easily sourced from Pinduoduo) will serve as a base with a long screw passed through the front panel and tightened onto the fan with the pressed-in nuts. Twenty 10 x 3mm long magnets are required—30 should be sufficient.