These 2.5″ propellers from HQProp can be used on smaller freestyle quads.

Package Includes:

2 x CW HQ Durable Prop T2.5X2X3V2S
2 x CCW HQ Durable Prop T2.5X2X3V2S BLUE

Specifications:

Propeller Diameter: 2.5 inch

Pitch: 2.5

Blades : 3

Material: Poly Carbonate

Weight:1.2g

Hub Diameter: 9.8mm

Hub Thickness:5mm

Shaft:1.9/1.5/1.9mm

Adaptor Rings: NO