Modeled After The Actual Trim Wheel Found In Cessna(r) 172/182 Aircraft Covers 9 Full Rotations Making It Extremely Accurate Unique 2-position Desk Clamp Keeps Trim Wheel Securely Fixed Mounts Either On Top Or In Front Of Desk Usb 2.0 Compatible With Windows(r) 7/xp/xp 64/vista Upc : 728658030063 Shipping Dimensions : 6.18in X 11.81in X 4.61in Estimated Shipping Weight : 2.38