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Product ID : B243
B243 O-Ring, Material=Buna-N, Nominal ID (in)=4 1/8, Nominal Width (in)=1/8, Actual ID (in)=4.109, Actual Width (in)=0.139
Description
More details on associated web page:
Buna-N O-Rings
O-Rings are available in five different materials from Scientific Instrument Services.

A superior electrical insulation for Heaters, Elements and Furnaces

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

O-Rings are available in five different materials from Scientific Instrument Services.

This convenient o-ring kit contains 30 of the most popular sizes, for a total of 380 o-rings, in one convenient kit.

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