Iris replacement propellers

Hey guys found the iris+ replacement propellers on the site but im just trying to find out which pair has a standard thread and which pair has a left hand thread. Any help would be appreciated.
Thanks

Hello @Waxpuppet,

Welcome to RobotShop community.

Unfortunately, this information isn’t provided by the manufacturer.

However, the propeller has 3 different ways to be installed so maybe this would help you:

Sincerely,