Tienly Motor Infinity U-40000 ( HS/HT, Short Axle )

– Helix shaped rotor drawing air inside to keep motor cool, also preventing carbon / oil residue accumulation
– High performance magnet
– Pinion gear included
– Suitable for battery packs up to 12V
– Recommended spring rating at 12V: M80-M150
– Safe rate of fire with M120 spring : 30 plus /-2 rounds
– 40000 RPM