This listing is for a Mix of 30 black NPT strain reliefs with gaskets and lock-nuts.Others may not include gasket and lock-nut, we do.Quantity 1 = 1 KitQuantity 2 = 2 Kits EtcYou Get The Following Per Kit - 5 X 1/4" - Cord diameter approx - 0.11" to 0.25", Mounting hole diameter - 0.52"5 X 3/8" - Cord diameter approx - 0.19" to 0.39", Mounting hole diameter - 0.66"5 X 1/2" - Cord diameter approx - 0.39" to 0.55", Mounting hole diameter - 0.83"5 X 3/4" - Cord diameter approx - 0.51" to 0.70", Mounting hole diameter - 1.03"5 X 1" - Cord diameter approx - 0.70" to 0.98", Mounting hole diameter - 1.30"5 X 1 1/4" - Cord diameter approx - 0.86" to 1.25", Mounting hole diameter - 1.64"•Full RoHS compliance•Superb relief against strain on cable•A wide range of cables will be accommodated•Nylon is 66.94V-2, UL approved•Fully certified IP 68 (Waterproof 1 cable per gland)Items are brand new industrial quality products.Items go by various names - Cord grip, Strain relief and Cable gland.Any questions please ask.Thanks for looking.Please see our other listings.