â–  Material: 0.035mm aluminum foil inside the tube, 1.0 ~ 1.4mm steel wire, middle-25mm thick 17Kg/m3 glass, cotton, reinforced aluminum foil coated with solder-dimensional  â–  Maximum Temperature: -30 ℃ ~ 150 ℃ â–  Maximum voltage: 250mmH2O  â–  additive Accessories: SHL-l tubes, HDR round single-leaf butterfly, RFC fork round the mouth, C2 round Rectifier  â–  Standard Length: 10M  â–  Size: Ñ„4 "~ Ñ„16"