1.It's our main product 2.Material:40Mn,with heat treatment 3.Features:,high precision,high realibility,low noise. CL24:pitch=38.1mm, pin diameter:13.0mm,plate thickness: 3.0mm,number of plates: 15,19,23...guide type: middle guide,side guideProduct features: high precision, high reliability, low noise,so the mechanical performance is better than tooth belt,gear and roller chain.Silent chain is ...