Surround™ Knee Patella Support Strap, Medium, 1 Each IV Poles Small fits 15 – 17 8975 Small fits 15 – 17 inch leg circumference (measure 4 inches above center of kneecap) 18 FIXED ARM * With Elevating leg Rests * Powder coated silver vein steel frame * Padded armrests * Embossed vinyl upholstery is durable lightweight attractive and easy to clean * Urethane tires mounted on composite wheel provides durability and low maintenance * Comes with push to lock brakes * 8 front casters adjustable in 3 positions * Carry pocket on backrest provides additional convenience * Comes with elevating legrests with tool free adjustable length riggings * Plastic footplates * Overall height: 36 * Hemi WC: Seat to floor height can be set to 17 The primary body of the strap is a soft nylon foam laminate with contact closures A cylindrical Floam™ bladder is encased inside the body of the primary patella strap and may be adjusted for added compression