According to the customer's requirements, it is 400mm, 450mm, and the height of the slot and baffle of the 600mm seat mouse board card, usually 500mm, can be customized. The width of the door used for the mouse blocking board is determined by a length of approximately 25mm, a thickness of approximately 40mm, a width of 30mm, and the thickness of the middle baffle of the card slot. Each mouse board nail installation comes with 4 expansion needs.