Worthington | sku: 431001 Worthington 1 Lb. 15% Silver Flat Brazing Rods 15% Silver, 5% Phosphorus, remainder is Copper. This is the best alloy for filling gaps when close fit-ups cannot be made. It also has the highest joint ductility and strength in HVAC-R applications. It meets AWS BCuP-5. Contains 15% silver, 5%... Log in for pricing