This bungee kit is specifically designed for universal crank-operated outdoor/indoor roller blinds. There are 2 bungee kits in 1 set, which can effectively prevent the roller blinds from being blown away by the wind. Each bungee kit contains 2 windproof balls and bases, 2 end caps, 4 high-density stainless steel screws, and 4 plastic anchors, ensuring a complete set of accessories.It has excellent applicability and can be adapted to most of the crank-operated roller blinds on the market. Moreover, the product is extremely easy to install and replace. With the attached installation instructions, even those with little installation experience can quickly get the job done, providing a reliable solution to meet your roller blinds' windproof needs. Color: Black.