Tank Sprinkler Replacement, Fits Most 1/2/5/10 Gallon Tanks, We 6 Threaded Shoe Caps 3 Coarse Threads and 3 Fine Threads. The internal thread size is 1-3/4--1.7 inches (about 4.4 - 4.3 cm), and can only be used for tanks with a water tank mouth size of 1.7 inches (about 4.4 cm). measure your fuel tank mouth size purchasing. High Quality Material These nozzle are made of high quality plastic material, which can be bent freely without breaking during use. Thickened and widened rubber gasket can better fit the cap and prevent liquid leakage when refueling. Spill-proof design, ( attention: the screw cap of the is hexagonal), the nozzle tube and nozzle cover are threaded, and there is a rubber sealing ring inside the nozzle cover. Tighten the nozzle cap after use. There is also no spillage when transporting or when the tank is dropped. More tanks can be covered, we two tanks with vent caps ( can vent cover - A is for tanks without at of the tank, you just need to simply drill and install it) ( Can vent cap-B for another tank, with vent cap on the rear, can replace the vent cap) Colour: Yellow Material: Plastic Package Contents: 6 * Screw caps (3 coarse and 3 fine threads) 3 * Yellow nozzles and rubber gaskets 3 * Threaded nozzle caps 2 types * Air valve caps 1 * Drill Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.