I believe most hobby stores us K&B Brass for tubes
This may work for you. McMaster-carr.com
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Tubing
2 products match your selections
TypeBrass TubingMetalBrassMaterialBrass Alloy 260ShapeSingle LineSystem of MeasurementInchOutside Dia.5/8" (.625")Inside Dia..495"Wall Thickness.065"Maximum Pressure Range, psi1,001-2,000Maximum Pressure1,820 psi @ 100º FLow Temperature Range-99° to -1° FHigh Temperature Range+101° to +200° FOperating Temperature Range-40° to +200° FMetal BendabilityNot BendableTemperHalf-Hard H58Metal ConstructionSeamlessFor Use WithAir and Gasoline and Natural GasShipped AsStraight LengthFittings UsedNo Specific RecommendationSpecifications MetAmerican Society for Testing and Materials (ASTM)ASTM SpecificationASTM B135
Length
36" |
6'
These 2 products match your selections
Length
Each 36"
8950K672$24.04
6'
8950K67336.43