Thermo Scientific™ NERL™ Chemistry Reagent, 5 gallon Cubitainer®, 1 Each Heel Elbow Protectors Knee High (Closed Toe) * Color:Red Knee High (Closed Toe) * Classic Black * 20 30 mmHg * Medium * Ankle Circumerence 8 1 2 9 1 2 * Calf Circumference 12 17 * * Attractive ribbed design with 3 D knit structure * Easy to wear with a comfortable band that keeps socks up without binding * Flat toes seams and a roomy toe section * Reinforced heels for a longer lasting durable product * Anti bacterial additive reduces unpleasant sock odor * Special Moisture Transport System with soft micro and multi fiber yarns in the sole keeps feet dryer * Latex Free * Color: classic black Soft stretch contoured foot design with a relaxed toe cap and enlarged heel pocket Contains no preservatives Typically prepared at 18 megohm cm specific resistance using reverse osmosis