QUICKFIT® Flasks Flat Bottom, medium neck, ground socket, NS 24/29, 250mL

Complies with ISO 4797 and ISO 1773, Manufactured from 3.3 expansion borosilicate glass complying with ISO 3585 (ASTM E-438 Type 1 Class A), All flasks have a nominal neck length of 45mm, The longer neck helps in reducing the problems associated with splashing and frothing, The flat base allows use with hotplates, Note: These flasks are not suitable for use under a positive or negative pressure