ga sails standard sdm alu extensionIntroducing the GA Sails Standard SDM Aluminum Extension. With the GA Sails Extension, you can be sure that no power is lost when setting your sail and that you can rely completely on your equipment. Years of development have resulted in a sturdy aluminum construction that guarantees high performance and absolute reliability on and off the water. Thanks to the roller bearing parts, setting your sail is easier than ever before, while the robust metal