Rubber Bumper 1.material:CR,SBR ,EPDM.CR,NR,NBR,silicone,viton 2.size: proposal 3.hardness:60-75A ... nuts + rubberizedNR,SBR,NBR,EPDM rubber + Zinc plated screw1) Materials: NR, CR ,SBR2) Characteristics: high/low temperature-resistant, wearing-resistant, oil ...