Clear Red-Reactive diameter: 1,2mm length: 43cm sales unit: 142g ( approx. 95-100 stringers ) When certain glass combinations become hot enough, they can produce an interface color, or reaction, as the ions in each adjacent glass mingle together. Two Oceanside Compatible products, Red Reactive Transparent (003-F), and Red Reactive Opal (045-F), were specifically developed to react when fused against Copper-bearing glasses, most often producing a deep reddish color where they intersect. Transparent and Opal Red Reactive formulas are also available in Accessory products.