Eaton Push-Button Switches Button cap 609681 - Eaton 218173, The Eaton button cap, model M22-XD-S-X7, features a black arrow symbol. Manufactured by Eaton, it is designed for use in control panels and operator interfaces. Ideal for industries requiring precise and clear directional controls. Eaton 218173 Button Cap Arrow Symbol Black 1pc Series M22-XD-S-X7