... foam reinforced inside.Haining Xinyida Solar Collector Tubes Co., Ltd. specializes in the ... vacuum collector tubes. Our company,owning 6 fully automatic production lines of vacuum coating, making ... full use of laser marking anti-counterfeit technology. Our annual yield reaches10,000,000 pieces of tubes ... , 1900mm, 2100mm and 2200mm. Advanced absorption coating of AL-N/AL and Cu/Ss-N ...