Type of product: Union collar and sleeve Specification: 2" S Most common size reference: 2 inch Overall outer dimensions approx: Max height: Max diameter: Internal diameter size: Commonly used with: 2 inch rigid pipe and 2 inch flexible rigid pipe. Used with Hydroair series pumps HA440 magnaflow. Additional notes: Best to use a plumbing cleaner then pipe cement to assemble. Pipe work pushes inside this part at the female end. Comes complete with o'ring. 2 inch. The flange area has a diameter of 73mm and the nut would screw on to an male threaded outlet approx 79mm. Fine thread.