Surfboard Hydrofoil Base Surfboard Kit Quick Release Easy to Assemble Aluminum. This surfing fin is made of high quality aluminum alloy, wear resistant, creates a durable and stable, and can be for a long time use. Surf fins are designed with good workmanship, smooth and wear resistant surfaces. Offers great hold grip both flat waters paddling and for turns? Our Surfboard hydrofoil base come is easy to install. It is easy to attach and remove without any tools. For most Surfboards, Long Boards, Paddleboard, especially surfing balance boards. Overall Size: 19.1cmx11.8cmx4.1cm/7.52inchx4.65inchx1.61inch. 19.1cmx11.8cmx4.1cm/7.52inchx4.65inchx1.61inch. Please allow slightly errors due to manual measurement and different monitors. Please pay what you win in 7 days. Because the unpaid dispute will not be closed automatically, and we may ignore it. Please verify your address during checkout. We are not responsible for any wrong or undeliverable addresses. We are committed to give you the best customer service possible. Please let us work on the issues. We’d like to settle any problem in a friendly manner. Due to the difference of time zone between Hong Kong and your location, sometimes the answer will be delayed. It’s just take you 1 minute. People always bought together with.