... ,viton,silicone,epdm,etc. 2. OEM supplied 3. best quality Made in China! Colored o ring : Rubber o ring seals features ... free to contact me.Best regardslisaSales representativeTianjin Qiantongda Rubber Products Trading Co., Ltd.Add: B-1103,Fanzheng Central Mansion, No.17 Huanghe ... , Tianjin, ChinaSkype:lisazhang511Tel: +86-22-87581869 Web: www.tjqtd.cn Made in China! Colored o ring