This is a set of 5 Kettalk butyl tapes, 2x50 ft each. This tape is self-adhesive and is used to seal and flash wood deck joists. It has been designed to be used for a variety of applications under any weather conditions. The product is manufactured in China and is highly durable and reliable. This set comes with 5 rolls of tape, with each roll containing 2 inches of tape and 50 feet of length. This is one of the best products available in the market for sealing and flashing of wood deck joists.