Durability and good sealing: durable and good sealing: this swimming pool filter cover is made of plastic, the filter cover is made of plastic, the surface is smooth, good sealing, high reliability and long service life. Satisfaction: If you have any questions, please feel free to contact us.We will do our best to help you.Item size (L x W x H): 5.8 x 3.9 x 2.9 cm, please measure the size before purchasing.If you have any questions, please do not hesitate to contact us.We will do our best to help you. Sufficient quantity: you will receive 10 replacement swimming pool filter pumps which will be more stable and sufficient for your needs and replacement, compatible with some swimming pool brands Scope of application: swimming pool drain plug compatible with swimming pools partially without piston valve, including models 28270, 28271, 28272, 28273, 26700, 26702, etc. Multifunctional: suitable for pipes with a diameter of 2.9 cm.A plug can be used to effectively prevent drainage when cleaning the pump filter cartridge or when replacing the filter pump.