Comparison : Item # 1317-40-180, 2-1/2"-8 Tube O.D. x Close(2-1/2") Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-181, 2-1/2"-8 Tube O.D. x 3" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-182, 2-1/2"-8 Tube O.D. x 3-1/2" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-183, 2-1/2"-8 Tube O.D. x 4" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-184, 2-1/2"-8 Tube O.D. x 4-1/2" Length Schedule 40 Seamless Lead Free Brass