The PHOENIX CONTACT part 3240537 is a slip-on sleeve that offers complete insulation. It is designed in a vibrant and eye-catching red color. This sleeve is suitable for use with wires ranging from 0.5 to 1.5 mm² in size. It is specially designed to be compatible with plugs measuring 4.8 x 0.8 mm. The slip-on sleeve ensures secure and reliable connections while providing excellent insulation for enhanced safety.