Cylinder telescopic protective sleeve is a cylindrical new mechanical components, high frequency heat sealing and sewing production methods. The high frequency of dust jacket bead support, sewing and dust jacket PVC material support, sewing dust cover can be divided into the overall style, zipper, stick-on activities. Cylinders, cylinder operating environment, the use of different materials production. Flame retardant high temperature materials, imported materials, domestic ordinary materials, constant temperature materials, low-temperature materials. Oil, acid, corrosion resistance, resistance to stretching. Dust-proof, waterproof, anti-oil, anti-emulsions and chemicals. Can be bent retractable. Specific to machinery and equipment can adapt to the instantaneous high temperature, high-pressure, high-speed friction work under harsh environment. Production and manufacture a cylindrical, conical, lighthouse-type and shape of the specifications according to customer specifications. Keng Hau clamp connection at both ends, both ends of the connection flange disc, connect both ends of the adhesive type, flange material is divided into PVC plate flanges, metal flange.