Material: The boat cover support poles is made of high-quality aluminum alloy, which is rust-proof and strong and will not bend or break.Cap and Base made from high-quality stainless steel. it's can serve for long years.  Adjustable Height- This boat cover support pole is easy to use, features a telescoping pole, boat cover support poles adjustable has 4 adjustable heights: 15 inch, 29.5 inch, 43 inch,57 inch to adapt to the height of the cabin. Stable Base：we have designed made up of a 5 inch mushroom cap and large 7.8" stainless steel base, The cap features with 3 slits that can allow extra tightening straps. It keeps boat cover support rod stable and is better than other plastic bases,it won't tilt or collapse in hurricanes and snowstorms.  Adjustable straps: This support poles for boat cover contains 3 pull adjustable straps, using high-density webbing technology and sturdy sewing, straps made with heavy duty stainless steel snap hook, the hook is not easy to be damaged.Perfect for bass boats, jon boats, pontoons, fishing boats, kayaks and center console boats.  Package: 1-pack adjustable boat cover support pole,1 bases, 1 mushroom heads, 3 black webbing, The boat cover support poles metal is easy to install.