https://www.boermedicals.com/products/laparoscopic-bladeless-trocar/ Bladeless Trocar Boer disposable bladeless trocar is made of medical grade metal, plastic, ABS and silicon. The channel tube is made tooth patterned to hold still to the abdominal wall while the procedure is taking place. The silicon valve in the trocar can stop air circulation so the pneumascos can last. Features of Laparoscopic Non Bladed Trocar Laparoscopic Bladeless Trocar Features Boer endoscopic bladeless obturator has different sizes, 5mm, 10mm and 12mm, it can be single packed or set packed as request. All prodcuts are steriled. Features & Benefits two layers seal system, double insurance for airproof universal-valve option accepts all laparoscopic instruments