... in cars, machines, electrical devices and instruments. Features: 1)Rubber Dust-Proof Sleeves Main raw materials: NBR, NEOP, NR, BR, ... , ECO, FKM, SI, CSM, ACM/NBR/PVC2) The rubber products are mainly used in cars, machines, electrical devices and ... design to mold support and samples6,Customers desighs and specifications are accepted7, Avaailable in various sizes and colors Rubber Dust-Proof Cover