These stickers are made from the same specification material as flowable silicone. They are cut to fit into a size 3 O-ring slot (eg. large bearing YoYoJam yo-yos and YoYoFactory). It provides no response but will give a tight bind for an easy bind return. They have an adhesive backing so that they will stay secure in your yo-yo until you want to remove them. These stickers are twice as thick as our standard vapor pads.