Used one of these to route the sensor cable outside of the waterproof box with battery powered controller. It was easy to install, airtight without pinching the wire, and all ten units share the same design. However, when the box was submerged in water, water seeped between the sleeve and the body. When it was sealed, water seeped through the carvings. For truly waterproof items, it must either come with flexible washers or use sealant.