1. Material: comply to RoHS, silicone or rubber (NR, SBR, NBR, EPDM, FR and more) 2. Any colour ... and size are availa 1. Material: comply to RoHS, silicone or rubber (NR, SBR, NBR, EPDM, FR and more)2. Any ... ,3D drawings or samples9. OEM and ODM orders are welcome Silicone rubbe coke ring button