Karlling Large Syringe for Nutrient Measuring 80cm Handy Tube 100ml Large plastic syringe,Good for nutrient and measuring 80cm length of flexible clear plastic tubing The syringe works because of the atmospheric pressure.And the nozzle is small.So please push slowly and gently. the tube is removable,if the tube is loose,please insert the nozzle into the tube hardly.If the nozzle of the tube is our of shape,You can cut the tube short to make a new good nozzle. Fragile item,If you receive a broken syringe,Please let us know and you will get a FULL REFUND or REPLACEMENT.