Lockable Open Regulating Valve for 75mm Heater Air Duct Y/T Connector Branch Specification: Product Name: Closed Open Regulating Valve Material: Plastic Color: Black Size: 105mm/4.13" x 51mm/2" Outer Diameter: 75mm/3" Ventilation louvers can be rotated 360 deg; to direct air as needed or close it completely to increase flow through other vents in the system. Fitment: For 75mm heater air pipe Y/T connector branch Package includes: 1x lockable open control valve/About service/On time deliveryFull refund if product is not received within guaranteed delivery timeLonger protection15 days more protection after order completionExtra ReturnsReturn any product, only those in perfect conditionGuaranteed qualityGuaranteed quality or full refund If you have any problems with our products or services, please kindly let us know before leaving negative feedback feedback.We will do our best to solve any problem and provide the best customer services.