Groove
width
M
A
B
e
T
L
L1
Quality
(g)
No.
(Aluminum extrusion series)
price
6
M3、M4、M5
5.8
8
0.5
3.8
17
4
20
M3、M4、M5、M6
7.8
11.5
6.85
10
30
M4、M5、M6、M8
9.8
14.6
0.7
7
11
40、45