Product Description Made of durable materials for reliable service, this replacement pump is built to ensure reliable operation of vacuum-operated vehicle functions. Ideal replacement - this vacuum pump matches the fit and function of the equipment pump to restore operation of vacuum-operated functions Durable construction - this vacuum pump is made of quality materials to ensure reliable performance and a long service life Cost-effective solution - offers equipment performance at competitive price for Isuzu NPR DIESEL 1995 - 2017 Diaphragm Diameter: 5 in Diaphragm Included: Yes Drive Type: Belt .