Product Specifications:

(1) Volume: 15-20,000ml

(2) Sand cores G1-G6 are available for selection

(3) Ground glass stoppers in sizes 19#, 24#, 29#, etc., are available for selection

Product Material: High borosilicate glass

Product Description:

Bottom-ground stopper, convenient for matching with ground joint filter flasks for vacuum filtration.

(2) Glassware with sand core should avoid sudden temperature changes during use, especially when placed in an oven for drying. Always place it in an oven at room temperature before increasing the heat; do not put it directly into a high-temperature oven. When removing, wait until the oven returns to room temperature before taking it out. Otherwise, due to the different thermal expansion coefficients of the sand core and glass wall, cracking may occur.