Same great features as Fast Cap but designed to be used with 2½" metal studs. 3 ½" Fast Cap for 2 ½" metal stud and 2 pieces of ½" drywall. 3 ¾" Fast Cap for 2 ½" metal stud and 2 pieces of 5/8" drywall.
https://www.trim-tex.com/products/overview/commercial-beads/fast-cap-beads/wall-fast-cap-2-metal-studs