ProDJuser D500 2U and 4U Rackmount, ideal metal case for amplifiers
Dimension
D500 2U Rackmount 480x360x88mm(WxLxH)
D500 4U Rackmount 480x380x155mm(WxLxH)

Click the link for more detail photos D500 RM2U 2u rackmount
Click the link for more detail photos D500 RM4U 4u rackmount