The best conservation-quality double-sided photo split tape by Henzo. Roll of 1000 acid-free large double-sided photo tape in a dispenser pack. Pre-cut squares attach to the back of photographs for easy and invisible mounting. Self-adhesive. We recommend using 4 on a 4"x6", 5 per 5"x7", and 9 per 8"x10" photograph.Good for 250 4"x6" photographs.