The Icicle are made of 4mm coro sticks that are 1.5" spacing and have 32 holes. These are if you have some Gable areas on your roof lines you want to outline with icicles. You can purchase the Icicle drops separately to connect to these to hang down to create the icicles. https://boscoyostudio.com/product/icicle-drops-4mm-coro/