Polyurethane dampers/buffers/pads for hydraulic hammer/rock breaker are made of optimum quality PU from famous companies in the world like Yantai Wanhua Chemicals etc.and with a variety of designs,colors and sizes available for users'option.Also can be customized according to buyers' special requirements.They are used as the damper/buffer inserts between the metal parts of rock breaker/hammer to absorb the vibration/shock/sound. Art No. Specs(mm) Weight(kg) Hardness(Shore A) SBU20 112*98*65 0.40 95 SBU30 126*106*65 0.50 95 SBU40 145*145*75 1.10 95 SBU43 145*145*75 1.10 95 SBU45 175*166*80 1.50 95 SBU50 217*217*106 3.40 95 SBU81 289*234*133 6.20 95 SBU81N 240*215*130 4.30 95 SBU20G 240*240*130 4.50 95 SBU130 290*326*155 9.00 95 SBU121 290*290*155 8.50 95 SBU30G 290*326*155 9.00 95 SBU151 290*326*155 9.00 95 SBD20 100*100*15 0.20 95 SBD30 137*126*15 0.30 95 SBD40 150*156*20 0.42 95 SBD43 172*160*20 0.43 95 SBD45 160*186*20 0.50 95 SBD50 240*210*20 0.80 95 SBD81 306*257*30 1.90 95 SBD81N 275*237*30 1.80 95 SBD20G 261*261*30 1.60 95 SBD130 325*290*30 2.50 95 SBD121 326*286*30 2.40 95 SBD30G 280*280*30 1.80 95 SBD151 352*325*30 3.00 95 SBS40 106*70*12 0.10 95 SBS43 106*70*12 0.10 95 SBS50 120*85*20 0.23 95 SBS81 200*120*20 0.56 95