ITEM NAME:50*2 knots 18650 battery hollow&solid insulators adhesive paper gasket Tw Description Color: cyan Size: 3.6*1.8cm/1.4*0.7in Material: insulating paper Features Insulate the battery terminals and Ni tape to avoid short circuits during soldering. How to use? Remove each piece of insulating paper from the base paper. Paste the upper hollow adhesive insulating paper over the positive electrode of the battery. Place the lower solid bonded insulating paper on the negative electrode. Then, you can weld the Ni tape or the nickel plated plate to the positive electrode and the negative electrode to make the battery pack. The package includes: 1 piece of 50pcs insulation paper.Paste the upper hollow adhesive insulating paper over the positive electrode of the battery. Place the lower solid bonded insulating paper on the negative electrode. Remove each piece of insulating paper from the base paper.