Descripción 12" x 12" (305 mm x 305 mm) Sheet Size with 1/8" (3.2 mm), 1/4" (6.4 mm), or 1/2" (12.7 mm) Thickness Easy to Cut and Shape for Multiple Uses Hardness: 70 Durometer (Measured Using the Shore "00" Scale) These pliable Sorbothane Sheets are ideal for isolating mechanical noise or vibrations. The sheets come in three thicknesses and can be placed under a breadboard in single or stacked layers to counter the effects of uneven work surfaces or to isolate the breadboard from vibrations. For objects over 5 lbs (approx. 2.2 kg), the thicker 1/4" (SB12B) or 1/2" (SB12C) sheets are recommended. For information on the isolation efficiency of these sheets at specific load capacities, please see the Sheet Selection Guide tab above.