With the 30th Anniversary of Spider-Man making quite a splash, Impel
didn't want to be completely left out in the cold, so they cheekily
produced this little five-card Spider-Man "promo set".
All cards were portrait, with frame and logos on the front. The back
featured the title, description, and a "web-zinger" factoid. Artists
were officially credited.
Note that Impel renamed itself to SkyBox International in April 1992.
Marvel purchased Fleer in July 1992, and then purchased SkyBox in
March 1995 and merged them to form Fleer/SkyBox. So this five-card
promo set was the only Spider-Man card set ever produced by Impel.