This is a Full Single Scrim for the LTM Cinepar 2.5-4K and Luxarc 2500 HMI lights, or any other fixture that accepts a 15.5" accessory.
Full scrims dim the light across the entire beam spread, and 1/2 and graduated scrims are used to even the beam spread when lighting a subject or background from an angle.
Keep several densities of scrims available to be prepared for any lighting situation.