Double maniflod with 4-port hollow glass stopcock and 35/20 spherical joint at right side 365mm in length
The double manifold,also called vacuum gas distributer,is usually used in Schlenk line.
With 35/20 ball joints and 4mm double oblique, high vacuum hollow glass stopcocks .
Lower vacuum chambers on stopcock are evacuated with a separate hole in the plug .
Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glasss and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in chemistry processes like heating and cooling.