CPAP Filter Replacement Accessories for Oxygen Concentrator XY-6-6S Series Premium replacement intake filter accessories specifically designed for Kaiya 3L-5L Series Oxygen Generator Machines. Product Specifications Material Plastic Product Dimensions 4.57" × 2.36" × 2.64" Compatible Devices Oxygen Concentrator Filter Mounting Type Slide In Filter Shape Square Number of Items 1 Number of Packs 1 Product Grade New Product Images Packaging & Delivery To better ensure the safety