Knee Pillow Memory Foam Electronic Stethoscopes Replacement Caster 5 x With Filter and 30 Replacement Caster 5 x 1 1 4 *HD Casters Have Threaded Stem For Extra Security And Safety *All Single Wheel Castes Come With Removable Bolt And Locknut Allowing Disassemlby For Easy Cleaning And Removal Of Build Up Grime Thread Or Anything Else That Your Wheel Picks Up During Normal Usage *This Caster System Will Add Longevity To Your Casters *Swivel: Double Ball Bearing With Hardened Raceways For Extra Strength *Cover: Helps Protect Swivel Bearings *Construction: Heavy Guage Cold Rolled Steel Formed For Strength Certified by NIOSH and the FDA this mask is certified for both medical and industrial use * N95 masks guard against microorganisms body fluids and particulate material * Easy to put on and take off and contain no fiberglass * Offers an improved fit with improved rigidity and inner foam strip to reduce eyewear fogging * Valve helps improve airflow and further reduces fogging while offering improved functionality * Close facial fit and highly effective filtration system * The protective capabilities of N95 respirator masks often surpass those of regular face masks * N95 masks are intended to be used for protection against solids such as those from minerals coal iron ore flour and many other substances * They are extremely durable with a soft and comfortable inner surface * Adjustable nosepiece and secured headstraps to provide proper fit * These masks have a 510(K) number for the medical market and can be used in TB situations as recommended by OSHA * NIOSH Approval: TC 84A 5411 FDA 510 (K): K020474 * SP * Ergonomically designed to provide ideal spinal alignment to help reduce lower back leg hip ankle or joint pain * Sleeping or sitting can be difficult for those with back leg hip or joint pain * A knee pillow when placed between the legs keeps your legs hips and spine parallel and aligned* This results in improved circulation and decreased pressure and strain on those areas * The high quality memory foam reacts fast to provide instant relief and comfort and provides slow memory foam recovery for longer support * The removable soft polyester and rayon cover zips off easily for machine washing * Hypo allergenic * 10 1 2 L x 8 W x 7 3 4 H *