FG fireproof sleeve is made of special mix materials, which will rapidly raise the temperature and expand when facing the frame. During that process, porous medium will be formed with good insulating so as to achieve isolating fire and heat. The fireproof sleeve is halogen-free with low smoke and high oxygen index including _reproof sleeve with vertical incision and _reproof inserting pipes without vertical incision. During the construction, fireproof sleeves are selected to pack according to the cable / pipe diameter referred to the following table. The left space can be filled by fireproof inserts without vertical incision as marked with * in the table. The traditional fireproof sleeve includes four kinds, 100mm, 150mm, 200mm, and 250mm in length. It can be tailor-made according to the actual depth of the cable frames (drum).