Just pick this one up to feel the nice grip and smooth action. The ultimate in ergonomic design. Highly visible Dial-a-dose indicator window. The barrel is easily unscrewed for cleaning and lubrication, and incorporates the front valve in a no-loss assembly. The valves are designed for easy flow of product. The Defender is supplied with both pour-on and drenching nozzles, and 1.3m of highly-flexible reinforced silicone 6.4mm i.d. delivery tubing. Doses: 20ml Defender - 5ml to 20ml in 1ml increments. 30ml Defender - 5ml to 30ml in 2ml increments. Dose rates of Defender guns are extremely accurate even at very low dose rates.