Specifications: The foam filter is made of high-quality foam and it is durable and practical to use. This filter is washable and can be used for several times. It is suitable for hot tubs, spa pools and so on. You can clean it with warm soapy water. Item Name: Hot Tub Filter Material: Foam Quantity: 1Pc (Optional) Suitable for: for VI S1 Features: Reusable, Washable, Easy to Use Outer Diameter: 10.4cm/3.94 (Approx.) Inside Diameter: 5.2cm/1.97 (Approx.) Height: 8cm/3.15 (Approx.) Notes: It is very important that your water is not over chlorinated as the foam will decompose. Please remove the filter when a chlorine shock treatment is used. It is normal that the filter will discolor. We recommend that your filter is checked daily to remove any debris and rinsed under a tap if necessary. The filter will last for many weeks if looked after correctly. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hot Tub Filter