Trocar sleeves for the 12 mm devices contain two seals, an outer integrated removable self-adjusting seal that accommodates instruments ranging from 5 mm to 12 mm in diameter where indicated and an internal seal.

At Ethicon, we’re focused on improving health outcomes for patients and helping solve the greatest health challenges… with only meaningful innovation. The kind that led to the creation of the first sutures, helped revolutionize surgery with minimally invasive procedures and elevate the standards of care around the world.
https://www.jnjmedicaldevices.com/en-EMEA/companies/ethicon