High quality self healing injector ports.
Can withstand +-30 injections before they will need to be replaced.
They fit into a 10 mm diameter hole.
(Note: These are sold as single units)
Mycological hobbyists use self-healing ports to modify the lids of their culture jars. The ports keep contaminants out and maintain the gas exchange while allowing one to inoculate the substrate via injecting spores/culture using a sterile culture syringe. The port immediately self-heals (sealing the hole where the syringe needle pierced through the rubber into the jar) once the needle is removed.