12mm or 15/32" Thickness - 24"x36" tile size - 25pcs per box. Underlayment provides thermal insulation and stress crack protection for floor coverings. It can be used in any room to add sound control or control room temperatures. NO RETURNS ON THIS ITEM

3mm or 1/8" Thickness - Rolls are 4 feet wide and length varies on square foot selected. Underlayment contains 200 million air cells per cubic inch for sound reduction, sufficient compression ratio to avert cracking of tile and grout and ease of installation makes it perfect under any flooring. NO RETURNS ON THIS ITEM

5mm or 7/32" Thickness - Rolls are 4 feet wide and length varies on square foot selected. Underlayment can be used to help sound reduction and insulate from heat or cold and is a perfect option under traditional flooring and does not require glues to install. NO RETURNS ON THIS ITEM

6mm or 1/4" Thickness - 24"x36" tile size - 50pcs per box. Our underlayment is a non-toxic, natural, environmentally friendly renewable resource that can be used under traditional or floating floors. Density: 11.7-12.5 lbs/ft3. NO RETURNS ON THIS ITEM

6mm or 1/4" Thickness - Rolls are 4 feet wide and length varies on square foot selected. With a variety of thicknesses, ranging from 3mm to 12mm, we offer plenty of options for rooms with high ceilings or to help control temperatures in your home. Density: 11.7-12.5 lbs/ft3. NO RETURNS ON THIS ITEM

8mm or 5/16" Thickness - 24"x36" tile size - 40pcs per box. Underlayment is a naturally resilient and provides excellent compressibility and recoverability making it ideal to install under cork floating floors. Underlayment will help with sound reduction and insulate your home. NO RETURNS ON THIS ITEM