Product

Extension Springs

EISEI can produce Extension springs with wire diameter from 0.1mm to 5.5 mm. EISEI uses advanced manufacturing facilities to supply a variety of extension springs. And meet the customer tensile strength requirements. EISEI can provide material SUS304，SWC, SWPA and SWPB for supporting customers. Of course, EISEI also can provide spring with silver wire, copper wire and other special materials according to customers drawing requirements. EISEI provides surface treatment for variety of spring: heat treatment,zinc plating, nickel plating, black coating, and others. Our extension springs are widely used in cars, shock absorbers, toys, electronic products and so on.