The Chapin Deluxe Professional All Purpose Hose End with Metering Dial features a durable poly tank with comfort-grip handle, built-in anti-siphon to prevent backflow and durable brass mixing head with 16 mixing ratios. Fits any standard size garden hose and sprays up to 320 Gal. from 32 oz. of concentrate. Fill, set and spray - it automatically mixes liquid concentrate with water.