Cold shrink tube open - ended, tubular, rubber, tubes which are factory expanded and assembled onto a removable core. The core is removed after the tube has been positioned for installation over an inline connection, terminal lug, etc., allowing the tube to shrink and for a water - resistant seal. The tube is made of silicone rubber which contains no chlorides and sulfurs.Suitable for communication, cable connector waterproof, cable connection insulation and seal, other types of insulation protection.