Feature:Prolongs the life of your machineNew and improved clear housing makes identifying a dirty filter simple.Guaranteed to fit Thank you for lookingReplacement parts, no prescription neededFor use with the Invacare Mobilaire (all models) and Platinum concentratorsConstruction of body: 100% Styrene Butadien CopolymerConstruction of filter: synthetic glass non-woven filter mediaPort size: 22 mm outlet with 3/8-18 internal threadsClear with smoke tint in colorMeets or exceeds all OEM specifications including Purity Standards and Back Pressure Performance TestingBacteria Efficiency Test: 99.9720%Virus Efficiency Test: 99.99%Function: sterilizationColor:As the pictureSize:13cm x 6cm x 4cm(5.12" x 2.36" x 1.57")Package incldue :1 HEPA filter Note:1. Manual measurement tolerance is 2-5g/cm. Please don't mind your proposal.2. Due to differences in display methods, the image may not reflect the actual color of the item. thank you very much!