Flown swatch of Hubble Space Telescope polymide insulation film retrieved during a 1999 shuttle mission. The silver-colored swatch measures .75 x 1, is numbered 72/75, and is encased in a limited edition 4.5 x 3.5 Lucite display against a color informational card with the reverse bearing a further description, in full: “This aluminized polymide film is from an original multi-layer insulation (MLI) blanket covering the exterior of the Hubble Space Telescope. It was removed on December 24, 1999, from the Support System Module’s Bay 10 door during Servicing Mission 3A by STS-103 astronauts Steven Smith and John Grunsfeld. This material flew on-orbit more than 1.5 billion miles from the April 24, 1990, launch of STS-31 (Hubble deployment) to the STS-103 landing on December 27, 1999.” In fine condition.