Strong and reliable, these suction cups can be attached to glass, and will hold to fabric strips with velcro ends on the suction cup. When using suction cups to hold your blackout blind, more should be used along the top as this is where most of the weight is held, with additional suction cups down the sides and along the bottom as required to hold the blackout close to the window. If there is excess fabric at the sides, then two or three should be used in each of the top two corners. The window glass should be completely clean and dry before attaching the suction cup. Please note you are purchasing only the accessory NOT the blinds. Quantity Guide: Easyblackout fabric: for blinds up to 130cm x 150cm we recommend 10 suction cups. For windows above 130cm x 200cm we recommend 16 or more suction cups, depending on window size. Easynight fabric: for blinds up to 230cm x 140cm we recommend 10 suction cups. For windows above 230cm x 140cm we recommend 16 or more suction cups, depending on window size. Here is some important info to read prior to putting the blinds up: The window frame must be completely clean and dry. Some cleaning products can leave a residue behind so we recommend rinsing the frame with water after cleaning, and allowing it to dry completely. It's important to place the strip correctly the first time, as removing and re-positioning weakens the adhesive. I also found placing the velcro pads higher and closer to the edge of the blind than the photograph shows on the instruction booklet made a firmer grip so the blind could not flop over and let light sneak in. For additional protection against peeping light you can use the 3M Command strips (not included) and place these strips in the corners of the windowsill as shown in the photographs. Please use all self-adhesive pads evenly to distribute the weight of the blind. When placing the sticky pads on the blinds, make sure this is on the silver backing, press firmly and leave 24 hours so the special fibre can adhere to the blind. A more thorough FAQ page can be located on our suppliers page including detailed measurements, and the differences between the blinds.
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