SPECIFICATIONS Product Dimensions: As picture shown Origin: (Origin ) Model Number: 16003085 Material type: PVC Material: PVC Item Type: for Bestway Replacement Filter Cartridge Features: This Bestway filter cartridge will fit 300/330 gal/hr filter pump systems. Filter Cartridges fit inside your Filter Pump and catch dirt as it passes through the system. Bestway suggests that you replace the Filter Cartridge every two weeks in the summer to keep the swimming water clean. Bestway Filter Cartridge Designed To Fit Bestway Filter Pumps 300/330 Cartridges Should Be Replaced Regularly To Maintain The Efficiency Of Your Filter Please check the size carefully before placing an order. Package Listing: 1/2/4/8PCS Swimming filter Product Pictures FREE SHIPPING IS INCLUDED!