http://i00.i.aliimg.com/img/pb/252/065/676/676065252_296.jpg

Features:
It is made from high-strength materials.
Maglev-method was adopted on the center fixing axis to balance the tested products with zero resistance.

Specifications:
Package size: 10 * 5 * 1 / 3.9 * 2 * 0.4
Package weight: 49g / 1.7oz
Color: Black & Purle
Used for: Quadcopter Propeller

Package list:
1 * ATG A-1 Propeller Balancer (Maglev) magnetic Essential

http://i01.i.aliimg.com/img/pb/253/065/676/676065253_146.jpg