Made from tough, heat resistant rubber - an effective flap valve to keep the following sea from moving slowly, stopping or reversing.
To adjust size, simply cut rubber mounting ring to the correct diameter and tighten the stainless clamp (not included).
Australia's largest marine accessories retailer. Serving boat owners since 1962. With sixteen big supermarkets and mail order departments Australia wide Whitworths Marine & Leisure offers the best service, convenient locations, a huge selection of quality products, and unbeatable prices.