About this 3D model

Part Size is 20mm X 8.25mm X 3.75mm, would recommend printing in 100% infil and in PETG for Summer sun heat resistance. Many of the generic blackout blinds on Amazon use a common Aluminum T-Channel to pull down. Such as this black out blind I'm using on amazon ( Amazon.com: Linen Avenue Cordless Sierra Blackout Roller Shade, Light Grey 46 1/2 W x 66 H : Home & Kitchen ) For people with tall windows this part allows for you to place a plastic part in the T channel that can hold a blind pull. See photo's for example. Part is designed to allow for tying a knot while keeping the knot shallow enough to slide freely within the T-channel. For the pull string and hardware I used ( Amazon.com: Hestya 1.8 mm White Braided Lift Shade Cord 55 Yards/Roll with 4 Pieces White Wood Pendant for Aluminum Blind Shade, Gardening Plant and Crafts (White) : Patio, Lawn & Garden )