Push Button, 22mm, Red, 40mm, Push-Pull Operator, Maintained, M2222. 5 mm, Non metallic Heavy Duty Push Pull Operator, Red Emergency Stop Operator, 40 mm Diameter, 2 Position, Operating Mode: Maintained Push, Maintained Pull, Non Illuminated. NEMA Rating: 4X, 13. ***Includes: Contact Block Holder*** The M22 line includes 35 mm, 45 mm and 60 mm Emergency Stop buttons with internationally accepted twist to release functionality. All are available in both keyed and non keyed versions; illuminated and non illuminated.