JB INDUSTRIES | sku: 3572828 Jb Industries Tube Expander Kit Tube Expander Kit; Heads in 3/8 in., 1/2 in., 5/8 in., 3/4 in., 7/8 in. and 1-1/8 in. . Forged aluminum body. Automatic retractable pin guide.Tube expander kitForged aluminum bodyAutomatic retractable pin guideEasy handling Log in for pricing