Potter-Elvehjem Tissue Grinders with PTFE Pestle and Glass Tube
Similar to 186-885500-series but with a PTFE pestle and an unground tube. Sizes 21 to 24 have radial serrations on the lower portion of the pestle to deliver the homogenate into the cylindrical portion of the tube. Replacement components are available and completely interchangeable. Clearance between pestles and tubes is 0.004" to 0.006". Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.