Glass Wool is Used as An Insulation Material in Buildings, Air Conditioning, and Industrial Applications. . It Simply Keeps Warm Equipment Warm and Cold Equipment Cold. the Product Comes as a “blanket” Which is Rolled and Put in a Large Plastic Bag. Each Roll (glasswool Blanket) Would have a Defined Density, Thickness, Length and Width. the Key Dimensions for a (glass Wool Blanket or Roll) Are: 1. Density- Normally 16, 24, 32 and 40 Kg/m3. There are also Non-standard Density Products - such as 12 and 14 Kg/m3. 2. Thickness: Normally 25mm and 50mm 3. Length- Depends On the Manufacturer and is Not a Key Factor 4. Width: is Normally Standard of 120 Cm 5. You Can Then Derive the Weight of the Roll (from Density, and other 3 Dimensions) another Factor to Consider is Whether the “roll” Has a Aluminum Sheet On One Side of the Roll. if It Has An Aluminum Roll On 1 Side, It is Called “faced” or “fsk”