Wiper arms etc are usually made from stainless steel
so they don't rust..
Superbugs have the longest wiper arms and blades...
Depends which wiper motor and running gear You have.
the shaft sizes are different and some have splines and some don't... My 68 Beetle has small parallel smooth shafts... the wiper arms have grub screws to attach them.
Supers had a larger splined shaft with a thead on the end for the nut that holds them on....
Lee
http://community.webshots.com/user/vw68autobug
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---