... heaters also known as cable heaters can be formed to a variety of shapes as required by its many applications. Frequently ... heaters where irregular size bores are found.A straight, round cable heater can snake through a sealing bar in packaging equipment installations. specification ... , 4.2mm X 2.2mm,3.2mm X 1.8mm, Round: 1.8mm, 3.3mm, 3.7mm