The TMM6 from Rogers Corporation is a Laminate with Dk (Dielectric Constant) 6, Df (Dissipation Factor) 0.0023, Td 425 °C, Thickness Inches 0.015" (0.381mm), 0.020" (0.508mm), 0.025" (0.635mm), 0.030" (0.762mm), 0.050" (1.270mm), 0.060" (1.524mm), 0.075" (1.905mm), 0.100" (2.540mm), 0.125" (3.175mm), 0.150" (3.810mm), 0.200" (5.080mm), 0.250" (6.350mm), 0.275" (6.985mm), 0.300" (7.620mm), 0.5, Thermal Coeffecient 18 ppm/°C. More details for TMM6 can be seen below.