To use these hydraulic jack oil plugs, first identify the leaking or damaged on your jack. Remove the old and clean the area thoroughly. Select the appropriate size from the 15-piece set and insert it into the oil filler hole. Ensure a fit to prevent any oil leakage. These plugs are designed to withstand high pressure, providing a reliable seal for your hydraulic jack. Features -Color:Black -Material:Rubber -Size:1.30X1.20X0.90cm/0.51X0.47X0.35in -Universal fit for multiple car brands: designed to be compatible with numerous car brands and models, this repair kit offers versatility for various automotive needs -High durability and sealing: constructed with durable materials, these parts ensure a tight seal and performance, reducing the need for frequent replacements - maintenance kit: this set includes everything needed for a wide range of repairs, providing a full of automotive maintenance -Userfriendly installation: no skills are required to install or remove these parts, making them ideal for both diy enthusiasts and mechanics -Portable and convenient: the compact and lightweight nature of this kit makes it easy to carry, ensuring you can perform repairs and replacements on the go Package list: 15 x jack oil plugs