The stoppers have an ergonomic grip that especially makes the opening and closing of volumetric flasks, mixing cylinders and reagent bottles easier and more secure. For optimal flask sealing the tapered bodies of the stoppers have molded ridges. Coloured inserts in the different sizes of stoppers allow the easy identification of the corresponding ground (ns/TS) neck size. The colour identification system used for the inserts is identical to that used for the KECKTM interchangeable glassware clips. The ergonomically shaped stoppers are suitable for closing volumetric flasks, mixing cylinders and standing bottles.

• Supplied with ergonomic polyethylene stopper for easy and safe tightening or removal
• Taper with several grooves ensures optimal flask sealing
• Coloured inserts in the different sizes of stoppers allow the easy identification of the corresponding standard ground neck size
• The colour identification system used for the inserts is identical to that used for the Keck™ interchangeable glassware clips
• The batch indicator represents the production period (year and month)
• With material designation for polyethylene "PE04" on the underside of the product

Specifications