Aluminum extrusion in picture NOT included. See my Ebay store for a Wide selection of aluminum trim.
Installation: Grasp trim at end and pinch it gently so the flanges fit into the grooves in the channel molding. Insert the trim into the molding, squeezing it together as you go. Gently press the vinyl to smooth out any bumps and ensure it is seated firmly in the grooves.
Please let me know if you have any questions. Thank you, Babette