If you're referring to a gimbal saver (device designed to attach to the gimbal to try to prevent separation and damage to the ribbon cable), I found the PhantomFix 3 to be an inexpensive solution. It doesn't adversely affect the gimbal at all and was easy to install.
Some people are also looking for a gimbal protector (device designed to protect the gimbal from being hit during a fall). I also utilize this type of protection, specifically the UAVBits Camera Support. It's lightweight and may protect the gimbal in case of a crash but also gives some extra stability to the legs.
Thankfully, I've never had a crash but these two little mods do give me a bit more peace of mind.
Its good but not saving the gimbal from broken main holder neck when hit the ground from more than 3 meters,
Not even protect the ribbon cable from the trees sticks if you fall down on top of trees,
Plus its 50 $ ,
My self prefer the carbon plate protector , it could save the gimbal from falling down or trees sticks ,
I donno thats my opinion?