【Size Selection】Attention: The fabric width is 1 narrower than the product size, and Inside Mount is recommended. Inside Mount: window frame depth should be ≥ 3 , the roller shade should be equal to or slightly smaller than your window width.Outside Mount: the blackout shades should be at least 4 wider than the window width 【Safe & Noise Free】The roller shades adopts a cordless design, which is safer for children and pets. It is easy to operate and can be operated with one hand to stop the curtain at any position without producing noise 【High Quality Materials】The roller blinds is made of high-quality polyester fiber composite, with smooth and soft fabric that can achieve 100% shading. It is also equipped with an aluminum alloy frame to improve its service life 【Rebound Speed Adjustment】There is an adjustment device on the right side of the blackout roller shades for rebound speed adjustment. If roller shade rise is too fast, please adjust the gear clockwise;if it is too slow or can not go up,adjust the dial anticlockwise to achieve a reasonable speed of rise 【Easy Installation】 In addition to roller blinds, our product also comes with installation accessories, including installation instructions, 2 brackets, 4 screws, and 4 expansion pipes. Please read the installation instructions before installation to help you quickly install the product Size 37.5 W x 72 H Color Grey Shape Rectangular Opacity Blackout Room Type Office,Kitchen,Bedroom,Living Room,Dining Room,Glass Door,Bathroom,Media Room Brand Name SILKVERSE Model Number Cordless Blackout Blinds Material Type Aluminum Mounting Type Inside Mount,Outside Mount Operation Mode Manual Additional Features Cordless, UV Protection Included Components Mounting Hardware Item Dimensions L x W 72 L x 37.5 W Product Care Instructions Spot Clean Only