Material: zinc alloy & plasticColor: black, white,grey, bronze-colored
1) Material: iron and nylon
2) Diameter: 38mm, 52mm
3) With plate/ screw/ panel holder/ sawtooth ring
4) With brake/ without brake
5) Panel size is 38*38mm, and can be customized.
6) Hole distance: 33mm, and can be customized.
7) Various models and specifications