This pool hose adapter is for above-ground swimming pools. Perfect for fitting a 1.25" hose to a 1.5" plunger valve or upgrading to a stronger filter pump. Designed for threaded connection pumps compatible with all 4000, 2500, 2000, and 1500 gallon/hour filter pumps that use threaded hose connections. Pool drain adapters make the connection tighter, help improve filtration, improve water quality, and make the water flowing into the pool clearer. Made of reliable and materials, these Pool Drain Adapters are durable and for use. Specification: Color: Grey Material:Plastics Size Chart: 11cm/4.33inch Package Includes: 1 Piece Hose Adapter(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!