Spa Cover Lifter 1.Made of top quality Aluminium alloy. 2.Easy to remove and store spa cover . 3. ... 's life . 2.Our product adopt gas strut theory ,made of Aluminium alloy,corrosion-resistant, non-rusting ,the weight just 4.6kg ... dismounted and assembled,adapt to spa cover for all kinds of shapes and size. 4.We have already applied for a ...