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Center Hole: 7/16"
Brass Vase Caps are a 2-1/4" diameter for lamps with small necks. Creates a pleasing union between lamp-body and socket. Use with glass, ceramic, porcelain and metal lamp bodies. Made of spun brass with a lightly brushed finish. Center hole slips 1/8 IP - 3/8" standard lamp pipe. To assure proper fit select vase-cap by interior diameter.