Attaches to standard 1.5" threaded extension columns. The Crimson C37 can be used as retrofit on existing columns or combine with Crimson E-series fixed extensions or EA-series adjustable extensions and CA ceiling adapters to complete the solution. Continuous tilt of 20deg. forward with 360deg. rotation. Makes a secure screen installation quick and easy, simply hang the screen and turn the pre-assembled securing screw to lock the VESA adapter in place. Compatible with all 1.5" NPT threaded pipe.