Titanium Set of 6, M6 x 50mm (1 15/16") prop bolts. Fits: Moster 185 Helix Prop with 10mm prop spacer
40mm bolts = Atom 80 Helix prop
50mm bolts = Moster 185 Helix Prop with 10mm prop spacer
55mm bolts = Atom 80 E-props - Atom 80 **New** Certified Vittorazi/Helix prop
60mm bolts = Moster 185 E-props with no spacer - Moster 185 **NEW** Fast Acceleration Prop
65mm bolts = Moster 185 E-props with 10mm prop spacer
