Cordova CPS18 Sleeves,Defender White Elastic Ends 200/Cs Particle Holdout: 99% efficiency of particles up to 0.35 microns Tensile Strength: MD=13.44 lbs/inch, CD=8.20 lbs/inch Elongation: MD=72%, CD=74% Hydrobead: CmH20=173.9, H20=68.46