【Application】Fits Compuchek test ports for Cummins diesel engines, as well as other diesel engines that have been outfitted with the Compuchek test port.【Powerful Function】Used to check fuel system pressure on diesel engines with a Conpucheck test port.【Practical Construction】The TU-32-20 pressure test gauge consists of a hose assembly with a female Compucheck fitting on one end and a 3-1/2", 0 to 300psi gauge on the other.【Superior Material】Made of the highest quality synthetic rubber, provides exceptional levels of performance and durability. The gauge is equipped with high precision dial to ensure value accurate and help to get your job done right.【100% Satisfaction Guarantee】Our focus on products and customer services is 2nd to n.