PLANS VIDEOS AIRCRAFT FAQ SHOP NOW! ask a pro contact shopping cart STOL King Ultra Pup Super Pup N3 Pup Stinger Aircraft Parts Main Category : Aircraft Parts- Pups, STOL King, Engine / Engine Parts Prop Hub-for two cylinder Scat crank [ enlarge ] Item Id: 8623667 MSRP: $150.00 Price: $139.95 In Stock: 10 Qty :   All prop hubs are made from 4140 steel and have a beautiful black oxide finish.