a. Made of semi-rigid non-toxic polyethylene. b. Color-coded for size identification. c. All sizes. d. With CE mark Guedel Airway a. Made of semi-rigid non-toxic polyethylene.b. Color-coded for size identification.c. Size: 000, 00,0,1,2,3,4,5,6d. With CE mark Guedel airway color coded