KIMAX® Low Form Heavy Duty glass “thick wall” beakers offer superior mechanical strength and durability. Improved safety when used under extreme conditions such as mechanized washing and rough handling.Kimax® beaker has a thick uniform wall throughout and extra wall thickness built into the evenly tooled top rim. Heavy construction is intended to prolong life expectancy with harder than normal usage (i.e. mechanical shock). Not recommended for use on hot plates where significant thermal gradients exist due to lack of agitation of contents or absence of a temperature control. All sizes have a durable matte-finish marking area and a white graduated scale.