UST Mamiya Helium Nanocore 5F4 Callaway Driver Shaft Retail AU$450
New UST Mamiya Helium Nanocore 5F4 Driver Shaft - straight off a 2023 Callaway Great Big Bertha Driver. This is a brand new high performance, light weight shaft (56g), mid-high launch, with a Regular/Stiff Flex. Personally, I did not find it a stiff flex and is more like a regular flex. It was not the right one for me and have swapped it for my former 60/6.6 HZRDUS shaft. These retail for $450 Australian and I am offering a huge discount. More info on the shaft here - https://www.ustmamiya.