Matador chimney 20 20 21 is among other used in Trawler lamp DH8201I/O.
Made of borosilicate glass with low expansion coefficient and therefore heat resistant. It won’t break when you light the lamp. Dishwasher safe.
Removes tension in the glass from the cutting of the tube openings. At last a chimney that stands normal usage!
Made in the Czech Republic.
The narrow Matador chimney 20 20 27 “Wizard” is not made of borosilicate glass!