Sett med koniske gummiringer for montering av büchnertrakt i sugekolbe.
Ring: innv. øvre/nedre utv. øvre/nedre
1 17,0/4,5mm 22,0/10,5mm
2 23,0/10,5mm 28,0/16,5mm
3 31,0/15,5mm 36,5/22,0mm
4 41,0/22,0mm 47,0/28,5mm
5 50,0/28,5mm 57,0/37,0mm
6 61,5/37,5mm 69,5/46,0mm
7 72,5/45,5mm 83,5/57,0mm