[7mm Diameter]

[8mm Diameter]

Ball pestles serve as the grinding media in conjunction with the use of SpectroVial comminution and blending vials for processing powdered material substances in SpectroMill Ball Pestle Impact Grinders. Plastic methylmethacrylate ball pestles are intended to be used with SpectroVial polystyrene vials. By comparison to SpectroVial metallic vials and their corresponding ball pestles, plastic is relatively soft and not very effective in the comminution process. Its principal application is for blending sample material substances or for comminuting soft samples.