The Sealey Cooling System and Pressure Cap Tester Kit is a professional diagnostic tool designed for testing cooling system integrity and pressure cap functionality across a wide range of vehicles. This versatile kit features an innovative inflatable bladder system that seals the pressure head to the radiator or header tank, eliminating the need for multiple fixed adaptors. The universal bladder design works with both screw and bayonet fittings, providing compatibility with approximately 90% of cars and light commercial vehicles straight out of the box. This makes it an ideal solution for workshops, mobile mechanics, and marine technicians who work across different vehicle manufacturers and models. Beyond standard automotive applications, this tester is equally suitable for motorcycles, off-road vehicles, and marine engines. The kit includes a comprehensive set of double-end adaptors specifically for testing cooling system pressure caps, covering major vehicle manufacturers including F