vacuum collector 1.high quality and reasonable price 2.environmental friendly 3.nice design 4.CE,ISO9001:2000,CCC,SGS Vacuum Collector1) high quality and reasonable price 2) environmental friendly 3) nice design 4) ISO9001:2000 StructureAll-Glass Double Tube Co-Axial StructureGlass MaterialHigh Borosilicate 3.3 GlassExternal Pipe Diameter & Thicknessdia.=47±0.5mm &=1.6mm, dia.=58±0.5mm &=1.6mm, ...