PREMIUM MATERIAL: The pool skimmer is made of durable PP and ABS plastic, unaffected by pool chemicals. Skimmer socks help to keep the filter running efficiently. This skimmer must be used with a filter pump providing a minimum flow rate of 800 GPH (3,028 L/hr). Insufficient flow is the #1 cause of poor performance. If you encounter any problems during use, you can contact us at any time. EASY to INSTALL: The automatic pool skimmer parts is equipped with detailed installation instructions. Simply hang the wall mount surface skimmer over the pool top edge and it will go to work. ADJUSTABLE BRACKET: The above ground pool accessories set is available in two different adjustable adapter for above ground pools with inflatable collars, tubular structures or metal frame structures. EASY to CLEAN: A detachable skimmer basket is installed inside the pool skimmer system, with a light pull, the garbage can be quickly cleaned by using the filter socks and poured out. NOTE: 1.For best skimming results, requires a filter pump with a minimum flow rate of 800 gph (3,028 L/hr). 2. The outer edge lip of the skimmer's basket should always be kept aligned slightly above the pool's water level. 3.To prevent the plastic clip from breaking，please do not over-tighten the clamp. Automatic Above Ground Pool Skimmer with 5 Premium Skimmer Sock