Chapin XP ProSeries™ Shut-Off Assembly is a genuine replacement part for Chapin® XP ProSeries™ Poly Sprayers and the Chapin® ProSeries™ 4 Gallon Back Pack Sprayer. It features a comfortable cushion grip, durable Viton® seals, and a removable, cleanable filter for reliable, long-lasting performance. This assembly ensures smooth operation and precise control for accurate application of fertilizers, pesticides, and other garden treatments.