Adapter Lower Ground Mouth Size 29/42 Upper Ground Mouth Size 29/42 Overall Length 82 mm USP Specification Type I Product Type Adapter Type Adapter Material Borosilicate Glass Color Clear Autoclavable No Features A Vacuum-Tight Seal is Created with the Open Top Compression Cap and FKM O-Ring to Allow Adjustable Immersion of Thermometers Cap is Suitable for Use to 150 Degrees C Replace the O-Ring with a PTFE-Lined Septum Supplied with One FKM O-Ring and One 410119 Cap