LAMPS & ADAPTORSCRIMPS, SLEEVE & SHRINKTRANSFORMER & DRIVERSTOOLSFIXINGSCONSUMABLESELECTRICALSSPECIALIST REPAIRPOINT OF SALECLEARANCE / REUSE
This is a plastic skirt that fits onto the T2 lampholders, holding a lampshade if needed. Simply screws on and off.
These used to be quite commonly replaced when high wattage halogen lamps were used. The skirt would go brittle & snap when the bulb or shade was being changed.
Width - 36mm, Height - 30mm