Loon(TM) - Deep Soft Tungsten putty that is applied, adjusted and sinks quickly This charcoal-colored nontoGrizzly Wulffic, Tungsten-based product is biodegradable and reusable, making it an environmentally friendly alternative to split shot and other lead-based weight. The weight and depth are easily adjustable, to make sure that a nymph always finds the bottom. FEATURES -Tungsten putty weight -Non-toGrizzly Wulffic -Non-lead -Reusable -Charcoal color -Can be used as temporary bead head for nymphs -20 grams