Comparison : Item # 16503, B963R CHAIN - A2 ATTACHMENT (WELDED)
Item # 17096, B963R CHAIN - A2 ATTACHMENT (WELDED)
Item # 20708, B963R CHAIN - A2 ATTACHMENT (WELDED)
Item # 20709, B963R CHAIN - A2 ATTACHMENT (WELDED)
Item # 20710, B963R CHAIN - A2 ATTACHMENT (WELDED)