Thomas & Betts TYD4X4WPG6 :: Wiring Duct Wide Slot, 4" x 4", Gray PVC :: PLATT ELECTRIC SUPPLY
Amazon.com: StarTech.com Open Slot Cable Management Raceway with Cover, 3"(75mm) W x 2"(50mm) H - 6.5ft(2m) Length - 1/4"(8mm) Slots, PVC Network Cable Hider/Wall Wire Duct, Max 180 Cables, UL Listed (CBMWD7550) :
3d Render White Wiring Duct Pvc Stock Illustration 1762972457 | Shutterstock
Hardware Specialty | Panduit Panduct® Type FS Solid Wall Wiring Duct, PVC, 4" x 4" x 6', White