Slide-On Repair Zipper Part Number: 8B-1 Sold as a set of 2. Easily converts the zipper of a one-pole tent like the Circus TC into a triple zipper. Also compatible with Soomloom HAPI 4P. Originally a convenient tool born in Sweden for easy repair of broken zippers. By utilizing its function to create a triple zipper, it makes installing a wood stove easier. I purchased this for use with tents other than the ones mentioned above, but it did not fit, so I am selling it. Thank you.