The middle of the range: faster than Cordierite, more controlled than Chrysolite. If you play a bit of everything, or aren’t sure which to pick, start here. Woven cloth on our Kinetic Vacuum base, 3 mm thick and firm (Shore C 22 ± 1), with a stitched edge sunk below the surface. XL 490 × 420 mm or XXL 500 × 500 mm.