Glass Block in clear fluted "1919/8 Paralline" 8" x 8" x 3-1/8"
Product link:
https://www.qualityglassblock.com/product/glass-block/basic-line/clear-glass/paralline/1919-8-paralline/?gclid=Cj0KCQjwi46iBhDyARIsAE3nVrZAGHfofpVqYxgXXdpk87iJTa9yYYw8tLxHb895pp_vFM33CMyecYwaAnEDEALw_wcB
Specifications
Actual Sizes: 7-1/2" x 7-1/2" x 3-1/8" Inch
Weight: 5.10
Heat Transmission U-Value (BTU/hr ft2 °F): .53
Thermal Resistance R-value: 1.89
Privacy: Moderate
Fire Rating: 45
Visible Light Transmission: 80%
Shading Coefficient: 90.80
Sound Transmission S.T.C. (dB): 37
Solar Heat Gain Coefficient: 79
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