No Installation: (The nozzle tube and nozzle cap are gasketed and all gaskets are installed, you can use them when you receive them) No need to be bothered by receiving a bunch of gaskets and not knowing how to install them. The rubber gaskets are all thickened and widened so that they can fit the cap better and prevent liquid leakage during refuelingGas Can Spout Replacement: The upgraded gas tank nozzle kit is more compatible. Gas can mouth sizes from 1.7in-1.82in both can be used, For most 1/2/5/6/10 gallon oil can (Please measure your oil cans mouth size before purchasing) The overall length of the nozzle tube is 8.1 in, which is more convenient and flexible to useCan Cover More Oil Cans: We offer two types of gas tank vent caps (gas can vent caps-A) is used for oil cans without a vent at the end of the oil can, You only need simple drilling and installation to use. (gas can vent caps-B) is used for another oil can with a vent cap at the tail, Can replace old vent capsSimple To Install: Each set of products includes, 4 Screw Collar Caps (2 Coarse Thread & 2 Fine Thread) 2 spouts tube and rubber gaskets, 2 nozzle caps with threads, 2 kinds of gas can vent caps, And the drill bit required to install the gas discharge cap. During the installation and use process, if you need assistance, you can , and we will serve you as quickly as possibleAnti-Overflow Design: The spout tube and the spout cap are threaded, and the spout cap has a rubber sealing gasket inside. When you have finished using it, tighten the oil outlet cap. There will be no oil overflow even in the case of transportation or the tank is down, Ensure your absolute safety in use. This gas tank nozzle kit is made of high quality HDPE material, which is freely bendable and durable