1.It's our main product 2.International Approval:ISO9001 3.Features:high speed,high precision,high realibility,low noise We produce HV3,HV4....Hy-Vo chain.Hy-Vo chain is high-tech products,use high level material.Product features: high precision,high speed running, high strength,good shock resistant,high reliability, low noisePin stype: rounded, triangle, double pinsPacking:Automobile chain is ...