The Access Tools Repairable Air Jack, available in four sizes: Mini Starter Air Jack, Standard Air Jack, Super Air Jack and Twin Air Jack, are all made of Ballistic Nylon and feature an internal stiffener. The Air Jack Air Wedge fits most vehicles. The most common issue causing a fault with any older, well used Air Jack is the air valve and pump bulb portion of the Air Jack. The Air Wedge Repair Kit fits all sizes of the Access Tools Air Jack and allows the user to easily replace the valve and pump bulb portion of their aging air wedge, making it once again like new, according to the company.