The 4 oz Natural HDPE Plastic Cylinder Round Bottle & Black Lotion Pump provides impact resistance with some flexibility. Includes 24/410 PP Black Lotion Pump with 7.5" Dip Tube. Dispensing Amount: 2 ml per stroke. Dip Tube will need to be cut to fit. When cutting the dip tube, make sure to cut at a 45 degree angle. Push pump down and twist to lock. Bottles are flame treated, which makes label application easier.