Automatic Syringe Bottle 1EM BT Options:Automatic Syringe Bottle 1EM BT For dogs 8 pounds or For dogs 8 pounds or larger with neck sizes 5 Inch Wardley Advanced Nutrition Perfect Protien Tropical Fish Flake Food is formulated to maximize protein utilization and reduce fish waste helping to keep water cleaner longer Features: Automatically self filling with bottle attachment Heavy Duty Bottle Cage for bottle protection (50ml & 100ml bottles only) Accurately delivers selected dose Easy V grip for high volume use Metal Luer Lock tip Removable barrel for cleaning Durable plastic design Amber colored barrel reduces UV sunlight exposure