JZP-4.0B Rubber Shock Absorber The JZP-4.0B is an assembled rubber shock absorber from the JZP-B series manufactured by Xi'an Hoan. The unit carries a nominal load of 4.0 kg and combines a steel spring core with a molded elastomer element. Installed between a vibrating source and its support, it absorbs shock and lowers transmitted vibration, keeping structure-borne noise away from floors, frames and housings. Typical mounting points include vehicle assemblies, general