Chapin G362D Deluxe Professional All Purpose Hose End Metering Dial, up to 320-Gallons (1 Sprayer/Package) 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 Sprays up to 320 gallons from 32 ounces of concentrate Automatically mixes liquid concentrate with water