... Chain & Sprocket 3.Feature:high speed, A&B serious short pitch precision copper drive chain transmission leaf ... as ANSI G7 roller chain. BL TypeBL Series leaf chains consist of link plates which are ... thicker and larger in contour than the AL Series link plates of the same pitch. The ... not used, so it is environmentally safe. Leaf chain(Bl series) LH2422, LH2423, LH2434, LH2444, LH2488, LH2466, LH2823, ...