Laboratory bottles, acc. to DIN ISO 1595 approved for work in the pressure range from -1 to +1.5 bar , thread GL 45, without cap. Grading in blue for optical differentiation from the regular laboratory bottle. With Retrace Code (Batch Certificate of Performance via Internet). Neutral glass / glass type 1 / according to USP/EP. With TÜV/GS marking. Applicable for pressure load: temperature change resistance 30 K, and maximum service temperature +140°C.

For caps and pouring rings see here, here, here and here.