This Aqua Tech LP-TZ Flat Port is for the Canon EF 70-200mm f/2.8L IS Image Stabilizer USM zoom lens. The port features a ball drive and ring gear zoom control. There is also a stabilizer ring. The port is threaded and will fit all Aqua Tech housings. No tools are required to add or remove the port.
For lens chart click here
LP-TZ Flat Port for Canon EF 70-200mm f/2.8L IS Image Stabilizer USM