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Product ID : R1237
R1237 Four Hole Round Ceramic Tube Insulator, OD (in)=0.187, ID (in)=0.047
Description
More details on associated web pages:
Four Hole Round Ceramic Tube Insulators
The following four hole alumina ceramic tube type insulators are available in six inch lengths.Ceramic Tubes
(Catalog A58)

The tubes are constructed of a pure 99% alumina ceramic that has superior gas and vacuum tightness and excellent insulating properties even at elevated temperatures.

Stepped insulators made from alumina ceramic.

Source insulators for Extrel mass spectrometers

A superior electrical insulation for Heaters, Elements and Furnaces

The following four hole alumina ceramic tube type insulators are available in six inch lengths.