55mm 4.25 Concave Block for Plastic 4 Pack

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    List Price: $133.70
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    Your Price: $133.70
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    Item#: 3001704
55 mm diameter, Base curve: 4.25

Developed to Coburn specifications, aluminum lens blocks enhance the processing of plastic lenses. The larger diameters ensure support for thin edges while the cavity is designed to match the base curve of the lens. This provides an even layer of blocking metal for uniform heat distribution. These aluminum blocks are made from high quality aluminum for fast dissipation of heat from the lens, precision machined for accurate thickness control, and hard anodized for long life. Coburn’s aluminum lens blocks are available in the range of size and curves.