Sold in 1lb bundles with a limit of 1lb per customer for the initial shipment. Zephyr is Double Helix new clear that has been specifically formulated to melt smoothly and easily. It resists boiling and scumming, has a low reactivity with silver lusters (does not change them) and exhibits a low seed count (bubbles). Zephyr is offered in wraped 1lb bundles to maintain its pristine surface.