Boat fender 16 in. x 4.5 in. provides high quality utility at an affordable price. Designed for use by trailered boats and in permanent protected moorings. Made from the highest quality marine grade vinyl. It is mildew, gas, oil, seawater and bacteria resistant. Twin Eye 3/4" diameter. Adjustable pressure valve, ribbed to reduce roll. For boats up to 15'. Ideal for permanent or temporary mooring, anchoring, rafting, on calm or rough water, low or high wind. Use 3 to 5 fenders along side with dock contact. Good for everyday use in rough or challenging mooring conditions. 1-year warranty against manufacturer defects.