The Automatic Drenching Gun is an adjustable dosing gun with an ergonomic metal body.? ?Features of The Automatic Drenching Gun?- Metal Body?- Accurate Setting?- Adjustable Dose?- Sterilizable 120?C?- Rapid Works?- Capacity 35ml?- Plastic Pipe??Before using this gun please ensure all tubing is attached firmly and that the included springs are securely fitted at over the tubing at each end!!