We are a coupling manufacturer and supplier from china.We supply
coupling for all over the world and product surface shall be smooth
and free from sand holes, blow holes, distortion or any other
defects. As the same time we can OEM Helical Rack. Rack assembled
by pressing a polyurethane sleeve into hubs on both sides.We have
the professional technical staff to help you install,shakedown test
and all after-sale service.