●For Bestway Size 2: Dimensions: Height 136mm, Outer Diameter 106mm, Inner Diameter 52mm. ●Antibacterial Filter: The new filter paper is added to the silver ions, making the Aoyern filter more antibacterial than conventional filters. ●Replace or clean: for optimal use, rinse immediately after use and replace every two weeks. ●Pool Filter Size 2 for Bestway: suitable for filter pump for bestway 530gal and 800Gal. ●SUPER SERVICE - If you are not satisfied with your product, we will offer you an exchange or refund.