FCL coupling,HRC coupling,chain couplings,jaw couplings,nylon teeth couplings,NM couplings Material :steel,cast iron,aluminium. FCL coupling HRC couplingCoupling-FCLwe professionally ... pulleys and other made-to -order parts. coupling:FCL couplings,chain couplings,HRC couplings,NM couplings.MH couplings,Jaw couplings,GE ... shafts, couplings ,pulleys, timing belt pulley,and so on., HRC coupling HRC150