These 90º Sweep Snap-In Nylon Liquid Tight Fittings are cost-saving and UL approved for use with Flexible PVC Liquid Tight Tubing found in the "Conduit/Tubing" section of the our Electrical Engineering Guide. They are available in 3 sizes; 3/8", 1/2", and 3/4", and provide a low-cost, one-piece solution with smooth internal surfaces for easier wire routing, protection and installation. Their all- Nylon 6/6 construction is resistant to salt water, weak acids, gasoline, alcohol, oil, grease and common solvents (note: this feature is not assessed by the UL certification and testing). Optional Collars (Black and Gray) are also available, to neaten rough cut tubing ends, and are listed below. Locknuts are listed in the "Liquid Tight Locknuts" section of our Electrical catalog.