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2. Table tennis rubber - Wikipedia

   en.wikipedia.org/wiki/Table_tennis_rubber

   In the 1950s, the sponge racket was introduced. It had a layer of foam underneath the layer of rubber. The foam helps provide more spin and speed. The International Table Tennis Federation (ITTF) regulated the thickness of the foam + rubber layer to a maximum of 4 mm (1 ⁄ 6 inch) thick, which has been the regulation in table tennis since. [1]

3. Building insulation material - Wikipedia

   en.wikipedia.org/wiki/Building_insulation_material

   Closed-cell foams are superior insulators. While open-cell foams typically have R-values of 3 to 4 per inch (RSI-0.53 to RSI-0.70 per inch), closed-cell foams can attain R-values of 5 to 8 per inch (RSI-0.88 to RSI-1.41 per inch). This is important if space is limited, because it allows a thinner layer of insulation to be used.

4. Styrofoam - Wikipedia

   en.wikipedia.org/wiki/Styrofoam

   The claimed R-value of styrofoam insulation is approximately 5 °F⋅ft 2 ⋅h/BTU for 1 inch thick sheet. [7] Styrofoam can be used under roads and other structures to prevent soil disturbances due to freezing and thawing. [8] [9] DuPont also produces styrofoam blocks and other shapes for use by florists and in craft products. [10]

5. Why Bala Bangles are my favorite fitness accessory - AOL

   www.aol.com/news/why-bala-bangles-favorite...

   Bala Bangles are flexible wrist and ankle weights available in 1-pound ($55), 2-pound ($65) and 3-pound ($79) options. (Ed's note: At the time of publishing, there were very few color and weight ...

6. Structural insulated panel - Wikipedia

   en.wikipedia.org/wiki/Structural_insulated_panel

   EPS is the most common of the foams used and has an R-value (thermal resistance) of about 4 °F·ft 2 ·h/Btu (equivalent to about 0.7 K·m 2 /W) per 25 mm thickness, which would give the 3.5 inches (89 mm) of foam in a 4.5-inch-thick (110 mm) panel an R value of 13.8 (caution: extrapolating R-values over thickness may be imprecise due to non ...

7. The Most Comfortable Swivel Chairs of 2024, Vetted by ... - AOL

   www.aol.com/most-comfortable-swivel-chairs-2024...

   The chair's hidden base features a steel ball-bearing mechanism for a smooth, 360-degree swivel and the standard 22-inch seat depth can be extended to an extra-deep 27 inches, if you choose the ...