<ul><li>extra large size</li><li>autoclave and pressure cooker safe</li><li>medical grade thick red rubber</li><li>fit's a 1/2 inch hole perfectly</li></ul><br><br>Super heavy duty self healing injection ports made from high grade red rubber. They are extra large thick autoclavable rubber stoppers which last ten times as long as any other we have used. They stand up remarkably to repeated sterilization runs in the autoclave or pressure cooker. Use a 1/2 inch drill bit to make holes for these.

Red Heavy Duty Self Healing Injection Ports (10)