What materials are used to make hydraulic jacks?

Hydraulic jacks are typically made from a combination of materials including steel for the main frame and components, which provides strength and durability. The hydraulic cylinder is often made of high-strength steel or aluminum to withstand high pressure. Seals and gaskets are usually made from rubber or various synthetic materials to ensure leak-proof operation. Additionally, some jacks may have plastic or rubber components for grips and non-slip surfaces.