Weight Weenies alarm: get the last grams off your custom build by using CeraMAG spacers to fine-tune your cockpit. CeraMAG is ceramic coated magnesium and is more lightweight than aluminum. Set of 4 spacers, in heights of 1.5mm (0.9 grams), 2.5mm (1.4 grams), 5mm (2.5 grams), and 10mm (4.6 grams).