glass tube 1.specification is OD14mm*WT1.1mm*L1240mm 2.hydroxy content is less than 25 3.efficient,healthy,no harm to health glass tube1.widely used in quartz halogen lamps,high density discgarge lamps and other UV light2.efficient,healthy,no harm to health,no pollution,economic,long life3.it can adjust to temperature of space automatically6. UV stop glass tube is doped Ce,can stop nearly all the ...