Specification Brand : DONLAB BulletPoint1 : Dia. 50mm / 1.969" flat bottom Crystallizing Dish BulletPoint2 : With a notch for easy pouring of liquid. BulletPoint3 : O.D. of top: 50mm; Hight: 38mm BulletPoint4 : Flat bottom Crystallizing dishs are place smoothly. ExternallyAssignedProductIdentifier1 : 0708257595606 ExternallyAssignedProductIdentifier2 : 708257595606 ItemName : DONLAB AGC-0050 Glass Dia. 50mm Flat Bottom Crystallizing Dish Borosilicate Glass 3.3 Crystallizing Dish with Notch ItemTypeKeyword : science-lab-petri-dishes Manufacturer : DONLAB Material : Borosilicate 3.3 glass NumberOfItems : 1 PartNumber : AGC-0050 ProductDescription : This series of flat bottom Crystallizing Dish Dish are made of Borosicate 3.3 glass,high light transmittance, sturdy and durable, heat resistant, high temperature resistant. The purpose of product design is to expand the heating area and evaporation surface, so that it is easy to monitor the precipitation of crystals.