We have found that the majority of our customers prefer the 12 gauge stranded steel cable with yellow jacket. This cable works well with our 6” spool, providing a compact system for most static bonding applications. However some companies prefer to use a heavier gauge cable. For this purpose we also carry a 4 gauge high strand count copper cable with yellow jacket. This fits well on our 8” spool. The type of spool and gauge of cable would be determined by your company requirements. If you require help in choosing the right setup for your needs, drop us an email or give us a call. We would be happy to help.