(Gear Boxes: 17/32" long x 5/8" wide x 9/32" high)
• AAR Type “E” Coupler
• Trouble Free Operation
• Hidden Knuckle Spring
• easy to install, drop in design
• Compatible with Kadee® #1-Scale Couplers
• World-renowned quality & performance
• They just Last & Last & Last...
Includes: 1 Pair Centerset Couplers, #821 Gear Boxes & Lids, #877 Centering Springs, 2-56 x 3/4 screws & 2-56 Nuts.