The Heavy Duty Spring Valve NRV Rubber Washer Set is a high-quality replacement component set designed specifically for HTP 30L and 50L imported sprayer pumps. This 12-piece pack includes durable NRV rubbers that ensure proper sealing, prevent pressure loss, and enhance output consistency. Made from premium-grade chemical-resistant rubber, these washers are compatible with popular HTP pump brands like Kisankraft, Aspee Billi, Neptune, and other China-type pumps. Engineered for precision fit and long-lasting performance, they effectively prevent backflow and maintain steady pump efficiency. Ideal for agricultural and horticultural spraying equipment maintenance, this washer set provides superior reliability, durability, and leak-free operation, making it essential for professional sprayer pump servicing and regular farm maintenance.