This replacement chimney fits the following E.S. Sorensen lamps which are made in Denmark - the Captain’s Cabin Lamp (ES 50 03 04) and the Classic Yacht Lamp. This yacht lamp chimney is made of borosilicate glass (Pyrex) and is heat resistant up to 600 °s Centigrade. It will not break when you light the oil lamp. It is thicker than most chimneys and can be washed in the dishwater.