This adapter is available in both "Midi" and "Maxi" formats

• "Midi" format is #11 Ace-Thred
• "Maxi" format is #15 Ace-Thred
• Bottom ground [ST] inner or spherical ball joint
• Top Ace-Thred joint
• Suitable for most vacuum work
• Fabricated from borosilicate glass

The #11 Ace-Thred sizes will accept inner tubes with diameters of 9mm to 10.5mm, such as thermowells, gas dispersion tubes, vacuum takeoffs; the #15 Ace-Thred sizes will accept inner tubes with diameters of 12.5mm to 14mm such as electrodes, inlet and outlet tubes, etc. Suitable for most vacuum work. Available as complete item, with nylon bushing and FETFE o-ring, or as glassware only.

It comes with a ground standard taper inner or spherical ball joint at the bottom and an Ace-Thred joint at the top.