Brass Shade Gallery & Socket ● Gallery (3 screws) Hole diameter (approx.) 2.8cm Outer frame diameter (approx.) 7.5cm Suitable for shade openings of approximately 6.3cm to 6.5cm. Screws are approximately 1.3cm long. Height (approx.) 2cm This is a fitting for attaching a lampshade. ● British Socket Can be attached to a shade with a 2.6cm hole. Please understand that this is an item from about 30 years ago before purchasing. Please check the condition in the photos. Individual sales are not available.