Package content: Compatible with all 4000, 2500, 2000 and 1500 GPH filter pumps that use threaded hose connections, they can solve the problem of the hose not fitting with the filter pump. material: the pool hose adapters are made of high quality plastic material, sturdy and , so you don't need to worry about leakage. increase the connection seal. Applicable size: the A-type hose adapter can connect male threads with an outside diameter of approximately 2 3/8 inches, and be wrapped with 1 1/4 or 1 1/2 inch hose. B-type hose adapter can connect female threads with an inside diameter of approximately 2 3/8 inches, or wrap a 1 1/4 inch hose. The stainless steel clamps can be shrunk in 27-51mm diameter; the rubber washers are 40mm/1.57inch inside diameter. Fitment: the pool hose connector set is compatible with 4000, 2500, 2000 and 1500 GPH filter pumps. They can be connected to different hoses or other connections to solve the problem of incompatibility between the above-ground pool and the filter pump, and enhance the compatibility of the two types of equipment. Easy to install: the pool hose adapters can be applied for many different connection methods. The actual method of connection varies for each user due to the different sizes of pool equipment and hoses. A-type and B-type adapters can be applied together or separately. Material: plastic colour: Grey Package Contents: 1 set Pool Hose Adapter(Style as shown in the picture) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.