This is a great 2S motor in the Electrifly Hyperflow 30mm fan. Same motor as included in the excellent F-86 they offer. Retain the little screws that come with this motor carefully. I don't have any replacements and they are easily lost. The motor constants and further specifications are unknown. Motor Diameter: 0.39" (10mm) Motor Length: 0.59" (15mm) Shaft Diameter: 0.059" (1.5mm) Weight: 5.3 grams Motor KV: 11,500
Best used with Hyperfly 30mm Rotor and Housing #GPMG3915.