Laboratory bottles with graduation, plastic coated, without cap, autoclavable, ISO 4796-1, with Retrace Code (Batch Certificate of Performance via Internet). The polyurethane (PU) plastic coating ensures reliable protection against scratches, shatters and leakage. The maximum permissible temperature is +135°C (max. 30 minutes).

1)A bead is molded in the glass on the shoulder of the 100 to 2000 ml size to indicate the nominal capacity level.
2)With a specially formed glass rim for better pouring (hence no need for an additional pouring ring made of plastic).
Important: Autoclave these flasks only with a loosely screwed cap (do not close tightly).
Membrane cap for all autoclavable processes see here. The bottle can be tightly closed with the membrane cap. The membrane provides for essential pressure compensation.