A high performance 3" prop from HQ featuring a full size hole for standard prop shafts up to 5mm.This is a pack of two HQ Props 3x3 Reverse Rotation Propellers. These high performance props feature a 5mm ID diameter mounting hub and include 3mm, 4mm and 5mm adapters. Instead of being made from a flexible plastic material like most props, HQ (High Quality) Props are made from a glass fiber composite material that helps them remain stiff and retain their shape. Even under harsh loads or wind, HQ Props help increase performance and provide stable punch-out's.Features:Made of composite material, not plasticExtremely stiff prop More stable during punch-out’s and in windAble to use higher P gain settingsAvailable in multiple colorsSpecifications: Weight: 1.5 grams Hub Inner Diameter: 5mm Hub Outer Diameter: 13.5mm Hub thickness: 7mm Includes:(2) CCW Props(2) 3mm Adapters(2) 4mm Adapters(2) 5mm Adapters