DAYTON, For 24 in Fan Dia., 100 to 240, Motorized Damper - 3C315|3C315 - Grainger
AC220v Stainless Steel 51 250mm electric Motorized Damper air Duct Vent air Damper Valve with remote control Adjustable angle| | - AliExpress
MVCD - Motorized Volume Control Damper Damper Selangor, Malaysia, Kuala Lumpur (KL), Seri Kembangan Manufacturer, Supplier, Supply, Supplies | Prudent Aire Engineering Sdn Bhd