TT-B-1325D, FEDERAL SPECIFICATION: BEADS (GLASS SPHERES) RETRO-REFLECTIVE (06-AUG-2000)
TT-B-1325D, FEDERAL SPECIFICATION: BEADS (GLASS SPHERES) RETRO-REFLECTIVE (06-AUG-2000)., This specification covers three types of retro-reflective beads used to reflectorize traffic and airfield marking paints.