Volumetric flask, class A, PMP, opaque, standard ground joint stopper, PP,1000mlVolumetric flask, class A, PMP, opaque, standard ground joint stopper, PP,1000ml Material: PMP. Autoclavable: yes. With ring marking individually calibrated to 'IN'. Tolerance class A according to DIN EN ISO 1042. With imprinted lot number and batch certificate. Cleaning at max. 60 C recommended to protect the printing. Exposure to temperatures up to 121 C (autoclaving) will not cause tolerance limits to be permanently exceeded. UV absorbent for