For chain line for 26" boom, order one Ref. 1. For chain line for 40" boom, order one Ref. 1and one Ref. 4. For chain line for 45" boom, order one Ref. 1, one Ref. 4 and one Ref. 28. For chain line for 54" boom, order one Ref. 1 and two Ref. 4. For chain line for 66" boom, order one Ref. 1 and three Ref. 4.
For chain line for 26" boom, order one Ref. 1. For chain line for 40" boom, order one Ref. 1and one Ref. 4. For chain line for 45" boom, order one Ref. 1, one Ref. 4 and one Ref. 29. For chain line for 54" boom, order one Ref. 1 and two Ref. 4. For chain line for 66" boom, order one Ref. 1 and three Ref. 4.
For chain line for 26" boom, order one Ref. 1. For chain line for 40" boom, order one Ref. 1and one Ref. 4. For chain line for 45" boom, order one Ref. 1, one Ref. 4 and one Ref. 29. For chain line for 54" boom, order one Ref. 1 and two Ref. 4. For chain line for 66" boom, order one Ref. 1 and three Ref. 4.