Anyone knows whats in the box for the Osmo Straight Extension Arm.  It mentioned that I can attach three accessories. To do that, I need to use the long screw and install an extra rosette mount. I do not see these two items in the box. Are these extras that needs to be purchased? I can't seem to find it in the store.

Quick Start Guide here: http://dl.djicdn.com/downloads/o ... _Start_Guide_en.pdf

I never purchased or had hands-on experience with this product, but I assume that the short screw would come pre-attached, and the long screw, rosette mount and rosette mount screws would come with the product inside the box.
This video here should be sufficient in showing what you should get from within the box:

If anything is missing, you should contact the seller, be it a retailer or DJI Store.

cat824 Posted at 2017-10-31 16:39
Quick Start Guide here: http://dl.djicdn.com/downloads/o ... _Start_Guide_en.pdf

I never purchased or had hands-on experience with this product, but I assume that the short screw would come pre-attached, and the long screw, rosette mount and rosette mount screws would come with the product inside the box.

Thank you Cat824. This is very helpful.

Cat824 is right, the short screw has been pre-attached, and the long screw and rosette mount would come with the product inside the box.