Base on DJI's "Left" and "Right" definition, you are looking at the Inspire 1 from the front, this arm is the "Left" one.
That means if you're looking from the behind, this arm will be the "Right" one.
Original OEM Service Parts
Unless noted all DJI repair parts are sold new with a 30 day warranty. Warranty does not cover user installation errors. Professional installation and services are available at www.cloudcitydrones.com/support.