Features: *This isThe first filter before the main filter, which filters out soap, oils, and other suspended particles before they reach the main filter. This helps reduce the use of chemicals, minimizes filter cleaning, and keeps the water clean. *Easy to install: Place the first filter on top of the skimmer basket. There will be a notch in the basket, ForAlign it with the notch to place it *Easy toMaintenance: It is recommended that the first filter be flushed weekly and more frequently based on usage; it is recommended that the first filter be replaced approximately every 3 months. During use, if there is something on the filter, just rinse it with water. *Material composition: filter layer is made of synthetic fiber, frame is made of polypropylene. Specifications: Part Name:Filters Material:Chemical fiber Size:About 19.5*19.5*1cm Color:White Package Content: 2*Filters Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. [SUPERIOR PRE-FILTER FUNCTIONALITY] This first filter captures soap and oils before they can clog your main filter, helping to keep your spa water clean and reducing needs. [EASY CARE ROUTINE] Flush weekly and replace approximately every three months; just rinse under water if dirt accumulates for hassle-free upkeep. [ for DURABLE MATERIALS USED] Constructed from synthetic fiber and polypropylene, this filter is built to last while effectively performing its function. [INSTALLATION MADE SIMPLE] Place on top of the skimmer basket by aligning it with the provided notch for easy installation.