To designate the chains with fixed bushings, the corresponding number in the table will be used, and the length of the chain in meters. Designation of a chain with fixed bushings, 25 mm pitch, 18 mm internal width, 15 mm bushing diameter and 5 m in length: CF 3X5 Chain UNE 18 084 Designation of a chain with fixed bushes, 70 mm long pitch, 65 mm wide, 42 mm diameter of collar and 5 m long: CF Chain 12x5 UNE 18 084