ESP Aperta Push to Exit Mushroom Release Button IP55 | EVEXITMIP55ESP Aperta Push to Exit Mushroom Release Button IP55 EVEXITMIP55 The ESP Aperta Push to Exit Mushroom Release Button is for use with the ESP Aperta door entry units and is IP55 making it suitable for use outdoors. Features Large mushroom exit button IP55 Ingress protection Normally open & closed contacts Clear wording Robust housing (Includes surface mount box) 85m x 80mm x 85mm 200g