Our aerial ignition spheres are manufactured by our affiliate company, PSDS, Inc. and have been subjected to extensive testing by IHOPs. Aerostat is the sole worldwide distributor of the PSDS spheres. The spheres are sold in boxes of 1000 with no minimum order quantities. We do offer quantity discounts based on the number of boxes purchased. Our spheres are of the highest quality and are backed by a replacement guarantee on any unused boxes should you ever be dissatisfied with the way they perform.