21MM Belt Width; 8MM Belt Pitch; 8M-21 Poly Chain GT2 Belt Style; 71 Teeth; 23.368MM Face Width; Bushed; 190.5MM Flange OD; 179.197MM OD; 180.797MM Pitch Diam; Keyway; 12.7 To 68.263MM Bushing Bore Range; 2517 Bushing; No Minimum Plain Bore

125MM Belt Width; 14MM Belt Pitch; 14M-125 Poly Chain GT2 Belt Style; 71 Teeth; 134.366MM Face Width; Bushed; 331.978MM Flange OD; 313.614MM OD; 316.357MM Pitch Diam; Keyway; 61.913 To 127MM Bushing Bore Range; 5040 Bushing; No Minimum Plain Bore