Our resistance hinge is supplied with the CL220 type and the CL272 type now. This product needs no maintenance after long term use. The CL220 type is composed of the pin, damping spring, damping bushing, female part, male part and other accessories. This product is made of zinc alloy coated with matt chrome. The pin is made of carbon steel plated with nickel. The CL272 type consists of the black PA leaf, carbon steel bolt, PC shaft and other parts. The resistance can be changed by adjusting the bolt. Moreover, the maximum opening angle of the product is 160°.