- Made from Wheaton 33 low extractable borosilicate glass
- Micro size for extremely precise work
- Reservoir and pouring lip are incorporated into the design
Similar to the all glass Potter-Elvehjem style, but micro size is for extremely precise work. This unit is designed for delicate hand operation. Clearance between pestle and tube is 0.004" to 0.006" (0.1 – 015 mm).