Comparison : Item # 1510-D-AL, Type D Reduced Cam & Groove Couplings (Female Coupler x Female NPT)
Item # 1510-D-SS, Type D Reduced Cam & Groove Couplings (Female Coupler x Female NPT)
Item # 2015-D-AL, Type D Reduced Cam & Groove Couplings (Female Coupler x Female NPT)
Item # 2015-D-SS, Type D Reduced Cam & Groove Couplings (Female Coupler x Female NPT)
Item # 3020-D-AL, Type D Reduced Cam & Groove Couplings (Female Coupler x Female NPT)