... 0.7mm &=1.6mm ; Φ=70±0.7mm &=2.0mm ;Inner tube dimension&thickness: Φ= 37±0.7mm &=1.6mm ; Φ= ... with foam reinforced inside.Haining Xinyida Solar Collector Tubes Co., Ltd. specializes in the production ... glass vacuum collector tubes. Our company,owning 6 fully automatic production lines of vacuum coating, making full ... 1800mm, 1900mm, 2100mm and 2200mm. Advanced absorption coating of AL-N/AL and Cu/Ss-N/AL ...