We can provide the O-Ring Kits of American Standard, English Standard, Japanese Standard etc, and its color include red, yellow, green...
The products include 5A(30sizes 382pcs), 5B(30size 382pcs), 5C(30size 386pcs), 8B(32size 407pcs), 8C(32size 419pcs) etc.
The material include NBR/ Silicone/ Viton etc.