Contoured Foam Cervical Pillow Standard w/White Cover Cane Seats Accepted by leading authorities as Cane-Accessories

Contoured Foam Cervical Pillow Standard w White Cover Cane Seats Accepted by leading authorities as Cane Accessories Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness each in two forms complete and incomplete * Includes four special plates for tests to determine the kind and degree of defect in color vision * Makes use of the peculiarity that in red green blindness blue and yellow appear remarkably bright compared with red and green * Color plates encased in specially designed album type books for ease of handling * Detailed instructions included SINGLE CHAMBER GARMENT * Full Leg 33 length * Compatiable with item # 510003 *HCPC CODE: E0660 * * Maximum circumference Upper thigh 28 Calf 20 Ankle 20 Polyurethane foam with height variations for different comfort levels * Aids in the reduction of cramps and stiff neck during sleep * Removable washable white cover * Dimensions: 18 x 16 x3