This is a replacement part only, for the stock DJI Phantom 2 Vision camera servo. I modelled it as part of a project to produce a camera trigger that uses the servo and the Phantom 2's 7th channel switch. I put it online in case anyone lost this item. It is available only in detail plastic as the gears of the cog need this particular level of accuracy.
For customers in Australia, or people wishing to buy this product in bulk, I can sell it via private sale for $6.50 per unit. Postage can be calculated at the Australia Post Website and invoices can be requested via email at email@example.com.