The TMM13i from Rogers Corporation is a Laminate with Dk (Dielectric Constant) 12, Df (Dissipation Factor) 0.0019, 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 19 ppm/°C. More details for TMM13i can be seen below.