Replacement Glass diffuser bowl under shade for Mid Century Hollywood Regency Table lamps with a cup around the actual socket . These replacement under shade bowls are marked National Home Lamp Council 955 these bowls are 5 inches tall 6 inches in diameter across the top and have a 2 1/4 inch lip fitter . The bottom is Clear prismatic glass to allow for Lighting distribution from the bottom of the over shade to allow for easier reading or other table side tasks . The frosted portion allows for the elimination of “ Hot Spots “ or glare from the light bulb on the cloth or Fabric lamp shade . The crenelations around the top edge allow for the spider of the over shade to stay centered . so no crooked shade . These bowls work well for replacement parts for Stiffle brand or Rembrandt brand Table lamps . These Items are new old stock , so you know they are not a lesser quality reproduction .

This new old stock Crystalite Diffuser Bowl glass shade features :

2 1/4 inch lip fitter

5 inches tall measured down thru the center

6 inch diameter Top opening

crenelated top edge for Lamp shade placement .

Marked National Home Lamp Council 955

all in all a great authentic replacement part for your vintage table lamps .