2 1/2″ x 10″ round Duplex glass chimney

2 1/2″ x 10″ round Duplex glass chimney, bulge 11 1/2″

fits 2 wick burners

If you have a ball shade please confirm the size of the opening on your shade to ensure fits through

https://www.bristolandbathantiques.com.au/product-category/kero-oil-lamp-glass-chimneys/