12-481-136 RK 428HSB chain 136L
12-524-120 RK 520KRO chain 120L
12-527-120 RK 520EXW 120L
12-52D-120L RK chain 520H 120L
12-53W-120 RK 530GXW chain 120L
12-55W-130 RK 252GXW chain 130L