【2 Wire Butterfly Replacement Parts for Non-Stop Fun】The package includes 2 wire butterfly replacement parts. When the original toy gets worn out after long hours of intense play, these replacements will keep your cat's playtime going without interruption.【Easy Replacement & Simple Operation】How to install the wire butterfly replacement parts? Just pull out the plastic part at the bottom of the wire from the main unit firmly, then take a new part, align it with the main unit's opening, adjust the plastic part at the bottom of the wire to the right angle and press it back into place.【Top Quality & Fast Service】【Pet Safety Guaranteed for Worry-Free PlayThe replacement parts are made of non-toxic materials and specifically designed for pet safety, allowing your beloved cat to play with peace of mind.