Light weight and precision aluminum CNC machined.
Pitch Ratio: 1.4
No. of Blades: 2
Shaft Size: 4mm
Drive Dog Slot: 3x3mm
Although it took 20' mins to balance this prop,it deserves 5 star for the overall quality versus price. I'm using it on my 32" catamaran with 4S LiPo.use in my traxxas spartan and get 55mph, but i have to dril the hole becase spartan is 3/16" and thats its 4mm, motor, esc and bat run coldThis prop surely is great..nicely finished, sharpen and light weight & no balancing needed..strong & good quality product..fit well on 4mm prop shaft with 1.4 pitch..my 31.5' Arowana boat is really flying using this prop..Great prop Hobbyking..luckily i bought this prop and it is cheaper too..Thanks HK..