1lbs Silver Brazing Rods 15% Silvaloy 28 Sticks 12-Pack /* Darker color for better

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+ Product Details Size - 20"w X 10"h X 2"d (for duct opening measurement only)

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no sharp edges & easy to clean

+ Product Details Size & Compatibilty - The 6" to 4" round metal pipe reducer & increaser 30 gauge is compatible with duct 6" to 4"

1lbs Silver Brazing Rods 15% Silvaloy 28 Sticks 12-Pack /* Darker color for better+ Product Details Includes 28 Rods Superior quality silver solder brazing metal rods used to join dissimilar metals for various commercial and residential applications such as refrigeration, HVAC, electronics, etc. Best alloy to fill gaps when close fit ups cannot be made highest joint ductility and strength in HVAC R applications. Chemical Composition: 15% Silver 6% Phosphorus 88% Copper Brazing Temperature: Solidus Temperature: 1190F, 643C Liquidus