Borosilicate glass Griffin Beakers are available in several styles. PYREX® Heavy Duty Graduated Griffin Beakers are specifically designed to offer the best mechanical strength under harsh conditions, such as mechanized washing operations. PYREX® Low Form Graduated Griffin Beakers with spout are manufactured with uniform wall thickness, offers optimum balance between thermal shock resistance and mechanical strength. Two quality brands to choose from, KIMAX® or PYREX®.