The GRACO 287929 Q GB KIT is a repair kit designed for the Mark V pump. It contains essential components to restore and maintain the performance of the pump, which is commonly used in fluid handling and spray equipment. The kit is engineered for reliability and compatibility with GRACO Mark V systems, ensuring optimal operation and longevity of the equipment. Materials used in the kit include a variety of wear-resistant and durable components such as stainless steel, PTFE, leather, nylon, zinc-plated carbon steel, tungsten carbide, brass, fluoroelastomer, acetal, and polyethylene.