This is a Bulk order for Shade reducer rings. Please check other products for lesser quantities. These are used to reduce a 40mm(larger hole) to a standard british 28mm size hole on Lampshade, etc.
You will require one reducer per shade, as this type inserts into the large 40mm hole and reduces it to a standard british size 28mm.
Please note these are injection molded parts so will have some plastic residue from forming. This does not in any way impede there use. (Just FYI)