Comparison : Item # 1317-40-020, 1/4"-18 Tube O.D. x Close(7/8") Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-021, 1/4"-18 Tube O.D. x 1-1/2" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-022, 1/4"-18 Tube O.D. x 2" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-023, 1/4"-18 Tube O.D. x 2-1/2" Length Schedule 40 Seamless Lead Free Brass
Item # 1317-40-024, 1/4"-18 Tube O.D. x 3" Length Schedule 40 Seamless Lead Free Brass