The clamp fits standard support rods, 12.5mm (1/2") and includes an adapter to fit to narrower 9.5mm (3/8") rods.  Graduations remain visible

Polypropylene is chemical resistant and autoclavable at 121°C (250°F). Per each.
 

Soft rubber pads hold Burette without scratching

Description:  Single Burette Clamp