Dubro Dual Pull-Pull System, HD: .91 & Up (DUB883) This is a Heavy Duty Dual Pull-Pull System for large aircraft .91 and larger. A pull-pull system replaces pushrods with a pair of cables. For large aircraft .91 and larger, comes complete with high-quality aluminum horns, washers, steel 8-32 long shaft, nuts, horn arms, and clevises (for 4-40 rods) with aluminum pivot pins plus 15ft. of nylon-coated stranded steel cable (.032 dia.) and all mounting hardware for 4-40. Features: Fewer binding problemsLighter weightReduces slop in controls Includes: Two aluminum hornsTwo washersOne 8-32 threaded shaft (4" long)Two nutsTwo horn armsTwo clevises for 4-40 rods with aluminum pivot pins15ft. nylon-coated stranded steel cable (.032" diameter)All mounting hardware for 4-404" Black heat-shrink tubeInstructions Du-Bro 101 – How To Install Pull-Pull Systems on RC Airplanes This video demonstrates how to install and use a DU-BRO pull-pull systems. Here’s our suggested approach: Prepare your tools and supplies needed for the installation Select the appropriate size (Catalog numbers: Micro: #846, Standard: #517 (2-56), #518 (4-40), and Heavy Duty: #881 & #883) If using the Heavy Duty system, assemble the control horn Assemble your clevises Cut your lines a bit long and create your loops, adjust as-needed, and crimp your crimps Trim the excess line and adjust the threaded rods for fine adjustment of the system Apply the shrink tube to the crimps and secure the clevis connections as well Video link: https://www.youtube.com/watch?v=afut-_hztQ8