• Made of borosilicate glass • An outer interchangeable joint at the top and a smaller inner interchangeable joint at the base • These joints are made to the same precision as all Borosil ground joints
Sizes:
1. 24/29 14/23
2. 24/29 19/26
3. 34/35 24/29
4. 34/35 29/32
5. 29/32 19/26
6. 34/35 19/26
7. 29/32 24/29
8. 19/26 14/23