Aviation Retractable Cable Reels ATC-30-DC Stage Ninja push to talk air transport communication reel. ATC-30-S Stage Ninja standard air transport communication reel. Optional Vertical Mounting Brackets VMB-9-S Stage Ninja optional vertical mounting bracket kit for 9 inch retractable reel housings. VMB-9-SVL Stage Ninja optional vertical swivel mounting bracket kit for 9 inch retractable reel housings.