SUNWAYMAN AP01 Wire-control Pressure Switch For T40CS T20CS M20C V20C Specifically designed to work with the Sunwayman T40CS, T20CS, M20C and V20C flashlights kit includes a replacement tailcap (with tailcap activation button and a plug for the pressure switch) and the cord and switch itself. curled 30mm cord, can stretch to 100mm and activate the light in momentary-on mode Tailcap is made of T6 grade aluminum alloy, mil-spec Type III hard anodized finished Total weight:145g