Aquatic Life T5 HO Hybrid 4-Lamp Mounting System Fixture Parts: Mounting Brackets and End Plates. Install your LED Fixture onto one or several LED Brackets. The Round Brackets will accommodate popular LED pendant fixtures like the Kessil, while the Rectangular Brackets have multiple slots where a screw can pass through to secure LED fixtures from AquaIllumination and EcoTech. 

• Hybrid Mounting System 16" Bracket, Rectangular: 5.375" x 1.25" (Pair) 470537
• Hybrid Mounting System 18" Bracket, Rectangular: 7.5" x 1.25" (Pair) 470531
• Hybrid Mounting System 24" Bracket, Rectangular: 12.75" x 1.25" (Pair) 470538
• Hybrid Mounting System 16"/18" Bracket, Rectangular: 7.5" x 5.5" (4" Opening) 470532 
• Hybrid Mounting System 16"/18" Bracket, Rectangular: 7.5" x 5.5" (2.5" Opening) 470533
• Hybrid 16" End Plate: 15.75" (Pair) 470534, Hybrid 18" End Plate: 18.1" (Pair) 470535
• Hybrid 24" End Plate: 23.25" (Pair) 470536