Discharge Rate: 1.20/1.80 ± 0.20ml/T, Specification: 20/400, 20/410, 20/415, 24/400, 24/410, 24/415, 28/400, 28/410, 28/415 Closure: smooth/ribbed/aluminium Spring option: SS304 , SS316 1. Left & Right twist lock pump , spring do not contact with liquid to avoid contamination and oxidation the liquid. Bow-tie style clip will double lock the pump . 2. Different kinds of closure size match with more standard bottles . 3. 2.0cc output suitable for the wide range of high viscosity , such as body lotion, Liquid soap , Hair care products ... ... 4. Aluminum closure is also available, UV plating the products will make your products more attractive.