Kit for standard and gas lens set-ups 0.040 in, 1/16 in, 3/32 in, 1/8 in and 5/32 in Reusable plastic case.Includes:(2) Back Caps (1) Short, (1) Long(10) Collets (1) 0.040 in, (3) 1/16 in, (2) 3/32 in, (2) 1/8 in, (1) 5/32 in(8) Collet Bodies (1) 0.040 in, (2) 1/16 in, (2) 3/32 in, (2) 1/8 in, (1) 5/32 in(4) Gas Lenses 0.040 in, 1/16 in, 3/32 in, and 1/8 in(2) Cup Gaskets(1) Gas Lens Insulator(4) O-Rings for Back Caps