This 20-pack of raceway inside elbows work with the StarTech.com CBMWD3816 raceway system. Join Two Raceways Together Inside Corners at a 90 Degree Angle Use these cable raceway inside elbows with the StarTech.com CBMWD3816 raceway to join two of them together at a 90 degree angle to extend the length of your raceway inside corners of your office or server room. Industrial Strength Made from sturdy self-extinguishing ABS that's also warp proof, these wiring duct elbow connectors are UL approved with 94HB Flamability (Horizontal Burning) Rating. Use in Combination with Other Raceway Accessories Combine this inside elbow with other StarTech.com CBMWD3816 raceway system accessories to give your cable management solution a finished look. The Coupler (CBMWD3816C) (20-Pack), joins two raceways together and extends the length of your raceway. The End Piece (CBMWD3816E) (20-Pack), cleanly caps off the end of your raceway. The Lateral Elbow (CBMWD3816L) (20-Pack), joins two raceways together and runs them up the wall at a 90 degree angle. The Outside Elbow (CBMWD3816O) (20-Pack), joins two raceways together around corners at a 90 degree angle. The T Connector (CBMWD3816T) (20-Pack), joins three raceways together in T-bar. These cable management raceway inside elbows are TAA compliant and backed by a StarTech.com Lifetime warranty and free 24/5 technical support. StarTech.com has been the IT professionals choice for over 30 years.