Roux SyringeRoux Syringe The only Roux with reverse threads on rear handle for self tightening The Henke Roux Syringe is a high quality, precision made, revolver style syringe known for its accuracy and used world wide in the livestock industry. Designed with a durable metal frame and glass barrels, the dosage is set by turning the dosage setting wheel at the rear of the barrel. For veterinary Livestock use only Dose: Adjustable from 1 4mL to 5mL depending on