The Solo 456 sprayers feature a large 4. 5″ filler opening which makes filling and cleaning up safe and easy. Chemically resistant VitonÂ® seals throughout. High density polyethylene tanks with ultra-violet inhibitors, which allow for unmatched durability and ultra-violet protection. Automatic pressure relief valve releases excess pressure at 45 psi and may be used to release pressure as desired. Solo handheld sprayers can reach full pressure with about half the pumping required by other brands. Shut-off valve and wand overall length is 28″ for hard to reach places. Four feet of high pressure hose for hard to reach places. Includes an assortment of four nozzles. Our toughest 2 gallon sprayer. Best for steady spraying under severe conditions.