Best Ceramic Dielectric

MSD Ignition 37124 Spark Plug, 4 Pack (1IR5L)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD Ignition 37154 Spark Plug, 4 Pack (2IR5L)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD Ignition 37184 Spark Plug, 4 Pack (5IR4L)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD Ignition 37314 Spark Plug, 4 Pack (11IR4Y)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD Ignition 37224 Spark Plug, 4 Pack (6IR5Y)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD Ignition 37114 Spark Plug, 4 Pack (1IR4Y)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
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MSD 3719 Iridium Spark Plug

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
  • Machined electrode increases exposure to the flame to improve combustion.
  • All spark plugs tested prior to packaging and shipping.
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MSD 37194 Iridium Spark Plug, (Pack of 4)

  • MSD's proprietary ceramic formula provides the highest dielectric strength.
  • Yttrium ground electrode reduces the chance of pre-ignition.
  • Machined electrode increases exposure to the flame to improve combustion.
  • All spark plugs tested prior to packaging and shipping.
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SVBONY 2 inches 90 Deg Dielectric Mirror Diagonal for Astronomical Telescope with 1.25 inches Adapter

  • Mirror Star Diagonal - 99% Reflectivity；Provides a Comfortable 90 Degree View from your Refractor.
  • New 2" 90 deg 99% Dielectric Mirror Diagonal for Telescope With 1.25" adapter.
  • has a 1/10th wave flat optical glass surface.
  • Both sizes of eyepieces may be used and are protected from dings and scratches that would result from a standard set-screw. This 2" diagonal works....
  • Dielectric diagonal is especially important.
  • A standard aluminized diagonal has about 92% reflectance.
  • And this decreases with time as the aluminum....
  • For the vast majority of the visible spectrum.
  • the reflectance does not vary more than about 0.1% below 100%.
  • And the dielectric surface does not age....
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