- With PTFE pestle and screw cap
- Made from Wheaton 33 low extractable borosilicate glass
This unit features a screw threaded neck for use with Wheaton connection®. The 13-425 cap has an open top and PTFE faced silicone rubber liner. The clearance between pestle and mortar is 0.002 – 0.006" (0.05 – 0.15 mm).