Small rubber bulb 1)Quality;Meet to SGS standard 2)Factory for silicone bulb 3)OEM of rsiliconebulb 4)Delivery time:7 days Small rubber bulb Material NBR, NR, EPDM, FKM, SBR, Silicone, Neoprene or Custom Size at your request Color transparent,black,any color Duro 30~80 Technics designed by 3D high accuracy, small error Finish diepressingMaterial- We use various kind of polymers like NBR, NR, EPDM ...