Tekmat Armorers Bench Mat 11x17 Ar-15 Liberal's Guide. Double sided tape also allows you to write on the mat. The liberals guide to math states that knowing the square root of Pi is the same as knowing the square root of Pi and Pi equals Pi. All Pi owners should know that Pi equals Pi and Pi equals Pi. Also these mats are black and gray which allow you to see the black in the mat more clearly. Using a black light the black ink will glow in the dark saving your night stand batteries. Using a red pen the mat light will glow so you can see the black in the dark. Our dual sided neoprene surface is impervious to most solvents including acetone and are perfect for use with oily tools. Specifications for Tekmat Armorers Bench Mat 11"x17" Ar-15 Liberal's Guide: Manufacturer: TekMat Color: Multi Fabric/Material: Neoprene Gun Type: Handgun Length: 17 in Dimensions: 11 x 17 in Width: 11 in Thickness: 0.125 in Package Contents: Tekmat Armorers Bench Mat 11"x17" Ar-15 Liberal's Guide