Comparison : Item # 1317-56-100, 1" Tube O.D. x Close (1-1/2") Length Schedule 40 Welded Nipple Galvanized Steel
Item # 1317-56-101, 1" Tube O.D. x 2" Length Schedule 40 Welded Nipple Galvanized Steel
Item # 1317-56-102, 1" Tube O.D. x 2-1/2" Length Schedule 40 Welded Nipple Galvanized Steel
Item # 1317-56-103, 1" Tube O.D. x 3" Length Schedule 40 Welded Nipple Galvanized Steel
Item # 1317-56-104, 1" Tube O.D. x 3-1/2" Length Schedule 40 Welded Nipple Galvanized Steel