Rosco

Rosco Laboratories is an international manufacturer of theatre products. The most common of which include Soft Goods, Fog, Color Media (or Gel), Gobos, stage/dance floors, lighting effects (gobo rotators, effects projectors, i-pro and i-cue, animation disks), props, and stage hardware, as well as an extensive line of high-quality scenic paints.
Rosco is known for their innovative moving mirror attachment for ellipsoidal reflector spotlights, known as the I-Cue.

Their website is www.rosco.com.