Comparison : Item # 378RX, Roller Conveyor Chains - 1.654" to 5.000" Pitch
Item # US278R, Roller Conveyor Chains - 1.654" to 5.000" Pitch
Item # 81X, Roller Conveyor Chains - 1.654" to 5.000" Pitch
Item # 81XH, Roller Conveyor Chains - 1.654" to 5.000" Pitch
Item # 81XHH, Roller Conveyor Chains - 1.654" to 5.000" Pitch