Index of Materials - Metal - Tubes

A metal is generally considered to be a pure element which readily forms cations. Metals are characterised by their opacity and high thermal and electrical conductivities, the latter properties resulting from the delocalised and mobile nature of the electrons over the crystal structure.

Tube

A hollow length of material normally circular in section. Most tubes are straight except those made of flexible polymer.

Tolerances
Outside diameter:	=<2mm	±0.05mm
	Polymer	±10%
	Ceramic	±10%

	=<5mm	±0.1mm
	Polymer	±10%
	Ceramic	±10%

	>5mm	±5%
	Polymer	±10%
	Ceramic	±10%

Wall thickness:		±10%
	Polymer	±20%
	Ceramic	±20%

Length:	<100mm	±1mm
	≥100mm	+5% / -1%