StarTech.com 20 Pack Cable Raceway Coupler for CBMCWD5020 - Cable Management Accessories - Raceway Fitting Midway Straight Connectors - UL - 20 Cable raceway couplers compatible w/CBMCWD5020 raceway to extend length - Cable management accessories - Wiring duct fitting midway straight connectors - 1.3in Length | 2.1in Width | 0.9in Height - Sturdy warp-proof ABS - UL RoHS: