Puritan® UniTranz RT® Specimen Collection and Transport System, 16 x 100 mm, 1 Case of 300 Heating Units Small: For men's shoe size stretchable sides so you Small: For men's shoe size 4 6 29 Long * Can be used with either standard arm or desk arm wheelchairs * Double notches allow the board to be used on either the right side or left side of the wheelchair * Constructed of plywood and finished with a smooth lacquered finish * The 24 board has one built in handle while the 29 board has two built in handles * Notch designed to fit into up right of wheelchair arm for added security during transfer * Supports up to 300 lbs * PCR and rapid tests Used in viral antigen detection test