B&P Lamp 3" X 10" Clear Slimline 10" Chimney Slimline clear chimney slips into ball shades w/narrow openings, for #2 burners and 3 inch galleries 3 inch fitter 10 inch height 3 1/2 inch bulge All glass chimneys will vary in thickness due to the manufacturing process. They will fit the holder/burner specified in their description