These new film splices are for repairing Super 8 movie film when you have a break in the film or want to splice two or more films together. There are 10 envelopes per package and each envelope contains two clear plastic pre-glued and slotted splices--one for each side of the film. Splicing film works better and easier with a film splicing machine or jig, but it can be done by hand if you take your time and be careful lining up the holes in the splices and film.