This Experimental UV tubing is a double dip crucible hand pulled tubing consisting of off-color UV reactive glass. Northstar was able to utilize & reuse some of the experiments made when formulating NS-145 Luna to produce this tubing. As an off-color limited run product, we have now made this tubing available to you directly online through Abe’s Vault. We recommend pre-heating each tube in the kiln at 1050f for at least 20-30 minutes before using in the torch. This will ensure that there is no loss of tubing from thermal shock. Since the tubing is hand pulled, the sizing will vary in diameter, wall thickness & taper.