1 x Push on terminal cover suitable for use with a variety of copper tube terminals and battery isolator switches. Material – Rubber Colour: Black IEM-AMAC1 = 6mm Internal Sleeve Diameter, 11mm Internal Cap Diameter. IEM-AMAC2 = 7.5mm Internal Sleeve Diameter, 15mm Internal Cap Diameter. IEM-AMAC3 = 9mm Internal Sleeve Diameter, 15mm Internal Cap Diameter.