1) We provide a cushion for each metering pump to ensure that it will not be damaged during transportation. 2) A separate inner packaging for each metering pump. 3) Multiple metering pumps are packed together in one big carton. 4) We provide another cushion for the inside of the big carton. 5) There is a waterproof membrane on the outside of the big carton. HEPHIS PVC PVDF SS Automatic Chemical Dosing Pump Diaphragm Dosing Pump Swimming Pool Dosing Pump For Sewage Treatment