Fast-acting and instant wetting design allows for faster soldering. The non-corrosive, non-conductive flux is ideal where a strong, long-lasting bond is needed. Available in any size ranging from 0.005" to 0.250". Also available for Fed Spec QQ-S-571d. Two standard put-ups: 1 Lb. and 5 Lbs. spools; 20 Lbs. spools available on special order.