DURAN® Laboratory Bottle GL 45, Protect coated Clear, Supplied Also called marking field, white marking spot or marking square. Material, PP, BORO 3.3, PU. Boro 3.3, Borosilicate glass 3.3 has a very good chemical Laboratory bottles DURAN® - Borosilicate glass You are ordering 10 Piece. Laboratory Bottle 250 ml borosilicate glass, GL45