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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.

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

Stepped insulators made from alumina ceramic.

Source insulators for Extrel mass spectrometers

A superior electrical insulation for Heaters, Elements and Furnaces