Everflo EF1000-BOX 12V Diaphragm Pump with 3/8" Hose Barb Ports, 1.0, GPM Master manufacturing diaphragm Sprayer pump - sprayer pump is approved for use with round-up and other agricultural brand herbicides Polypropylene housing and valve plate for longevity and chemical resistance Viton valves - Neoprene diaphragm for increased durability and efficiency