High performance 1/8 brushless motor. 4,200W max power to 60,000RPM. Several KVs available (choose it through the selector). Sealed or vented version (choose it through the selector). 5 or 8mm diameter shaft (choose it through the selector). KV and max volt: 7000KV (2S), 4590KV (3S), 3770KV (4S), 3570KV (4S), 2900KV (5S), 2750KV (5S), 2450KV (6S), 2100KV (7S), 1980KV (7S), 1850KV (8S), 1680KV (8-9S), 1580KV (9S), 1380KV (10S), 1180KV (12S), 1020KV (14S), 910KV (16S). Spot shaft on shaft: Yes. Output shaft lenght: 24mm. We hope it arrives on time; however, since this.