These Polarizing Plates are used with the LDR / LDR2 Series Ring Lights.
Please Note: If you are using one of these Polarizing Plates with the LDR2-32, LDR2-42, LDR2-50, LDR2-90, or LDR2-120 Light Unit, you will need a separate Adapter for attachment. (The DF-LDR2-70 does not require an adapter. Directly affix it to the Light Unit.)