Similar to the weighted tubing we have offered in the past, this tubing remains on the bottom even when filled with air. No weights required. Airmax EasySet weighted tubing has been manufactured to our specifications making it more flexible, durable and safer. It is now guaranteed: kink free, puncture resistant, and lead free. All complete aeration kits are shipped with EasySet standard tubing. This 5/8" airline is for use with applications requiring 300 feet or more of tubing. Applications requiring less than 300 feet can utilize our 3/8 EasySet self-weighted airline. Have a long run of airline between your aerator cabinet and the water's edge? Use our 3/8" Direct Burial Airline for applications where the airline is buried above the water's surface.