Globes are white acrylic. 12 inches in diameter with a 5.7 inch outside diameter twist lock neck with 3 notches and are made to be used with a 5.7 inch inside diameter twist lock neck fitter. Globes are one piece, injection blow molded acrylic, water and shatter resistant with UV inhibitors. If your existing globe's neck is larger than or less than 5.7 inches this will not work with your fitter. Made in America.