Features . 4 in x 16 ft Aluminum Tubes for In Ground Pool Cover Reel System. This durable aluminum tube kit is designed for use with pool solar cover reels that can support a 4 inch tube. Includes 4 tubes for easy assembly. Fits pools up to 16 feet across Specifications . Material Aluminum. Size 4 x 16 ft . Dimension 16 Long x 4 Diameter. Weight 10 lbs