The Rectal Insufflation Catheters are the perfect combination of rigidity and flexibility and are designed for easy insertion allowing for easy absorption of ozone through the walls of the colon to the bloodstream. They are built for durability, allowing a long lifetime of treatment. The catheters measure 3/16” (4mm) in diameter and 12” (305mm) in length and include a female luer lock attachment for easy connection to other ozone accessories.