Airmax EasySet Weight Airline is available in 3/8" or 5/8" diameters in lengths of 25', 50' or 100' rolls. This sinkable airline is ideal for carrying air from an aeration compressor to a weighted diffuser plate. Creating greater circulation and increasing oxygen levels in your pond or lake. Designed for underwater applications, Airmax EasySet Weighted Airline rests on the bottom of your pond and is guaranteed not float even when filled with air. With a thick-wall and lead-free construction, EasySet Weighted Airline creates a durable, fish-safe, kink-free and puncture resistant airline for years of continuous use.The Airmax EasySet Weighted Pond Airline is designed for underwater applications. The airline rests on the bottom of your pond and is guaranteed not to float, even when filled with air. with a thick-wall and lead-free construction, EasySet weighted airline offers a durable, fish-safe, kink-free, and puncture-resistant option for years of continuous use with your compatible water aeration system. Please Note: Connectors are not included.