3D Printed Din Rail Anycubic bed Size 220 x 220 8.74 x 250 mm 9.94" Rack Chassis The inside dimensions of a 19-inch wide, 300 mm deep 1U rackmount enclosure are approximately 16.73 in x 11.61 in x 1.37 in.
Standard Din Rail is
7.5mm tall by 35mm wide by 25 mm on the inside 5.5mm depth of channel
For rack space...