Base diameter: 1.888" - 10 3/4" tall
Height to pinch: 2.256"
Diameter at pinch: 1.090"
Diameter of first bulge: 1.422"
Diameter middle of draft control constriction: 1.106"
Diameter of secondary bulge: 1.289"
Diameter of chimney above secondary bulge: 1.056"
Throat diameter: 1.182"
Height: 10.75"
Student lamps will burn well with the traditional design chimney but after several years of experimentation I was able to modify a 14''' Sans Rival chimney design to considerably improve the light output and clean burning characteristics of student lamps using a 1 7/8' fitter chimney. This Student Sans Rival Chimney is an exclusive, made only for me in the USA from my mold with thick borosilicate glass.
The draft control constriction is what makes this chimney burn so wonderfully. It pulls up the flame and compresses it to induce complete combustion of the fuel, resulting in an elongated "white light" flame with considerably better brightness and clean burning when compared to a standard student lamp style chimney. It is amazing.
