For the Ring Lights LDR2-90 series.Used for installing a Diffusion Plate or Polarizing Plate on the Light Unit.Tighten the screws on the side panel of the Adapter to secure them. Product Details Dimensions Outer diameter φ96 mm, Inner diameter φ84 mm, Height 8 mm Operating temperature and humidity Temperature: 0 to 40℃, Humidity: 20% to 85%RH (with no condensation) Storage temperature and humidity Temperature: -20 to 60℃, Humidity: 20% to 85%RH (with no condensation) Conformed standards RoHS Weight 30 g max. Accessories Fixing screws x 4, Hexagonal wrench, Operation Guide Notes Applicable products: LDR2-90 Caution Use this product in a location with minimal vibration.