Diamond Audio Technology M331i Owner's Manual page 8

General dimensions in millimeters and [inches]. Not to scale.
26
[1.02"]
3
[0.12"]
Ø 4.3
Ø 133
[0,16"]
[5.24"]
M351, M351i
Ø 156
[6.14"]
Ø 142
[5.59"]
Ø 79
[3.11"]
Ø 119
[4.68"]
6 [0.22"]
57.5
[2.26"]