A range of glassware made from heat resistant borosilicate glass.
Bored Laboratory Grade Rubber Bung to fit 250ml Erlenmeyer Flas
£1.75
A laboratory grade tapered (31mm/37mm) rubber stopper which fits a variety of vessels including the neck of the 250ml Erlenmeyer Flask & the 5 gallon glass carboy.
It has a 9mm hole drilled though the centre to take an airlock.