Easy to Use & Warranty - This supportpole can support any area under your boat cover,prevent deris and water build-up, helps maintain the lifetime of your boat. At Tuszom, We offer 36 months warranty. Any request will be responsed within 24 hours, please contact us if you have any questions. Easy to achive 4 Adjustable Heights: The steel poles can be easily removed with the push-button locking system, to achieve the height of 17inch, 30inch, 42inch and 55inch respectively, which can better match the depth of the boat or the height you need to support the boat cover. ADJUSTABLE STRAPS: The heavy duty 5" large mushroom cap features with 3 holes(1.4inch long and 0.4inch wide )for threading straps through and hold the boat pole cover upright while putting the cover on, or during high winter winds. The mushroom cap is made of high quality ABS material than others on the market to prevent tearing your cover, prolong the service life. Durable & Rustproof Steel Pole: The steel pole is 1-1/8-inch in diameter, has a wall thickness of 0.8mm, can withstand pressures of more than 200 pounds, and is much stronger and more durable than other plastic poles; The powder design Steel Pole to prevent rust, passed salt spray test. Provide Sandbags to Greatly Improve Stability: The stable base is 9 inches in diameter, the larger round base provides more stability and durabily, helps to hold the boat cover or boat tarp in harsh weather. In addition, we provide sandbags, so that the pole provides unprecedented stability experience!.