Chief CMA640B Decorative Ring, CMS / CPA Fixed / Inner Adjustable Column, 1.9" ID, Black

Hide unsightly ceiling openings and deliver a finished look to your AV and security installs with the Chief by Legrand CMA640B Decorative Ring. Designed as a mounting ring accessory for projector extension columns, this finish ring covers the hole where a fixed CMS or CPA column passes through suspended ceiling tiles — improving aesthetics while protecting cabling and connections. The hinged design opens for quick installation or retrofits, so you can service or adjust columns without disturbing ceiling tiles. With a 1.91" inner diameter and a durable black finish, the CMA640B blends seamlessly into monitoring, surveillance and control-room environments and pairs with columns rated up to 250 lb. Built to integrate with professional AV and security infrastructures, it helps maintain clean sightlines for cameras and projectors and keeps installations looking intentional. Backed by a 10-year limited warranty from Legrand, this mounting ring is a low-cost way to upgrade the appearance and serviceability of ceiling-mounted systems. Ideal for conference rooms, control rooms and surveillance deployments — add the CMA640B to your next ceiling mount project or contact sales to learn more.

• Conceals ceiling cutouts for a clean, professional finish on projector, AV and surveillance column installs
• Hinged design for fast, tool-free installation or retrofit access without removing ceiling tiles
• Fits fixed CMS and CPA extension columns with a 1.91" inner diameter for reliable compatibility
• Low-profile black finish keeps security, monitoring and control room environments discreet and consistent
• Works with extension columns rated up to 250 lb and is backed by a 10-year limited warranty