Comparison : Item # 1-ST, Fluid Couplings, Series ST, Straight Through
Item # 2-ST, Fluid Couplings, Series ST, Straight Through
Item # 3-ST, Fluid Couplings, Series ST, Straight Through
Item # 4-ST, Fluid Couplings, Series ST, Straight Through
Item # 6-ST, Fluid Couplings, Series ST, Straight Through