Introduction: The doser 500ml catalyst consists of a bottle, a test tube with a lid. It is used for all liquid and provides high precision of proportions. The graduated cylinder provides excellent dosage of liquids. His squeeze bottle allows to trace fluid touch. Features: Doser catalyst component: polyethylene (PE) bottle PE 500ml Specimen: 15ml Graduation every 1ml Advantage: Allows precise and safe dosage of the catalyst the liquid back into the dosing by simply pressing the bottle Adjusts all liquids