CFK-Folding Prop38x20 cm Graupner 1343.38.20 CFRP FOLDING PROP. Diagonally laid carbon fibre twill cloth for extreme torsional rigidity. Precision-made aluminium root socket. High carbon fibre content for light weight. Polished clear surface coat. New series of folding propellers. Ultra-high quality, hand-made items. Specially designed for the enormous loads encountered when run on ULTRA high-performance motors. Diameter/pitch 38/20 cm 15/8