工厂生产，接受定制，多种规格任选

6MM*17M
 2880R

12MM*17M
1728R

16MM*16M
 2112R

16MM*30.5
2448R

18MM*16M
22848R

18MM*18M
 7488R

18MM*20M
5568R

18MM*30M
1440R

18MM*34M
44784R

18MM*36M
64224R

18MM*40M
25488R

18MM*50M
6048R

24MM*34M
2916R

36MM*34M
 576R

48MM*20M 
1080R

48MM*34M
3960R

48MM*36M
1584R