... tubes. Specification:Header tube: seamless copper TU1, Ø22mm×1.2mm thicknessOuter manifold: aluminium alloy, 2.0mm thicknessBracket: ... aluninium alloy,1.6 thicknessInsulation: polyurethane froyhing, 40~50mm thicknessVacumm tube: ... tri-elements coating, copper heat pipe inside, Ø50mm×1.8mCopper heat pipe: 0.6mm thicknessLogo: OEM stickerVacuum tube ...