Upgradelights 7 Inch Harp and Slip Uno Adapter for Lamp Using Uno Euro Fitter with 1-7/16 I.d. Slip Uno adapters are made to fit directly over a lamp socket found on lamps usually purchased at places like IKEA this adapter will then let a harp attached to it 7 inch harp Slip Uno adapters are made to fit directly over a plastic lamp socket 7 inch harp Slip Uno adapters are made to fit directly over a plastic lamp socket American family owned small business, USA based customer service. Always next day free shipping from NC.