This is "Air Sealing Tape" made by Asahi Fiber Glass, a major manufacturer of glass wool insulation. When performing airtight construction with glass wool/rock wool insulation (mainly bare products), connecting the seams of the "moisture barrier airtight sheet" with this tape allows for complete moisture barrier and airtightness. This product is also ideal for treating and repairing seams in the moisture barrier layer of packaged insulation. - Tape Type: Air Sealing Tape - Length: 20m - Color: Blue - Color: White I am selling this because I no longer need it and would like to pass it on to someone who can use it. It is new and unused, but there are minor scratches on the outer bag due to home storage. *Due to the risk of substitution, returns and exchanges are not accepted. Please purchase with your understanding. *Cancellations after purchase are not accepted. Please ask any questions in the comment section beforehand. *We are not responsible for any problems during shipping (damage, loss, etc.). Please consult with us in advance if you are concerned. *Shipping will be in simple packaging. Please note that we may use recycled boxes for shipping. Thank you for viewing.