Neoprene - Commercial Grade - 45A - Soft Rubber Sheet Rolls - 1/4" Thick x 12" Width x 12" Length Offers excellent all around chemical and ozone resistant qualities Soft rubber sheets with minimum tensile strength of 700 PSI (5 MPA) An elastic synthetic rubber makes this neoprene rubber ideal for padding Soft rubber pads with a durometer of 35-45 offers great flexibility and elasticity Soft Neoprene has an approximate weight of 1lbs per square foot in 1/8 inch thick