As with our well known and very economical short and long nozzle teat sprayers, our new Viton models are light and convenient to use. The difference is the chemical resistant Viton rubber valve and seal components. Standard teat spray chemicals quite quickly break down normal rubber seal components, but Viton lasts significantly longer. Although the cost is quite a bit higher, the extra life and consequent reduction of frustration, is well worth the extra cost. Bottle capacity 1 litre.