These clever little adhesive cubes give you the magic of a thread conditioner that attaches right onto your sewing machine. The thread runs through the hypoallergenic, conditioning gel with every stitch adding strength, preventing tangling and fraying of threads. It is safe for all threads, especially metallic and embroidery, and fabrics. It can be used for machine as well as hand sewing and acid free gel leaves no residue behind. 'Thread Magic' thread conditioner by Taylor Seville. Pack includes 2 pieces.