These high flow camlock fittings are custom made for us and have an increased inner diameter for maximum flow rate.
I was not satisfied with normal camlock fittings, because the narrow hose barb would be a bottle neck in the system, so I paid for a custom mold for a higher flow version. The hose barbs on these camlocks have an 11mm inner diameter and a 16mm outer diameter. That was the perfect match for our 11x18mm silicone tubing.
Like all our camlocks, they have a smooth surface finish inside and a silicone seal.