For 500mL and 1L flasks. Holds flask and cover together firmly. Consists of a ring and three insulated spring-activated clamping arms that fit beneath the flange of the flask body. Stainless steel springs.
Safety Pack Volumetric Flask Set, Class A, made of high quality, heavy duty, ASTM, Material: borosilicate 3.3 glass, Includes 10, 25 and 50ml cap, features a single white graduation mark and is fitted with a glass stopper, thick walls provide excellent strength