He fitted the pipes to a nine - metre - long solid oak plank , which was one metre wide at the base .
Bolle decided to make a construction of four borosilicate glass ( e.g. Pyrex ) pipes of 90 mm diameter .
Bolle fitted the pipes to a nine - metre - long solid oak plank , which was one metre wide at the base .
Bolle decided to make a construction of four borosilicate glass ( e.g. Pyrex ) pipes of 90 mm diameter .