Stopper\black PEEK\conical Shaft\central+2.3+2.6 mm Port: for pH and reference electrode, central titration port and two additional ports (2.3 mm and 2.6 mm); conical bottom.
Two stoppers are included in the O2k-pH ISE-Module.
Configuration
1 Volume-Calibration Ring (A or B)
2 mounted O-rings, with 8 spare O-rings (O-ring\Viton®\12.5×1 mm)
