Industrial Motor Chain, Widely Used in Metallurgy, Pharmacy and Cars Model Number: ... sealing auxiliary materials (alumina ceramics, carbon-graphite, rubber parts, and precision punching elements) Rubber parts: NBR, EPDM, Viton, silica gel and chlorinated ... : Pump seal: WM301, WM155, WM560A, WMBIA, WM1, WM20 and WMFBD Industrial pump seal: WM1527, WMCG, WM58U 59U, WM5Q and WMCU Double ...