The Chimera's Adjustable Quartz Daylite speed ring features four adjustable ears to accommodate the barn door/accessory holders of a wide range of fixtures. The indexed ears are engraved at each measurement increment, and fit lights from 9 in/229 mm to 16-1/8 in/410mm. This ring is designed with dual pole blocks, to fit Chimera's Quartz Standard or Daylite Standard lightbanks offering an immense versatility of light shaping.