Many Star Trek card sets released from 1994-1996 included a cinema ad card that you could use to order this set.

You are getting a complete set of each movie:

1. Star Trek The  Motion Picture

2. Star Trek II; The wrath Of Khan

3. Star Trek III; The Search For Spock

4. Star Trek IV; The voyage Home

5. Star Trek V; The Final Frontier

6. Star Trek VI; The Undiscovered Country

All six (6) sets are still sealed in their packaging.

Listed separately on Ebay is the uncut promo sheet advertising this collection.

Also listed separately are two of the Cinema Ad cards that were placed in some of the Skybox Star Trek card boxes released from 1994 to 1996. 

Each of the ad cards came with their own unique code printed on one corner of the card that identifies what series the card came from. [ ie. E596 (ST TNG Season 5) and T396 (30 Years Phase Three)]