The NSI FS1-33-8N Flexible Braided Jumper Grounding Strap is made from copper with a tin-plated finish, is 12" long and has a maximum amperage of 330A indoors or 400A in outdoor applications. Use flexible braided grounding straps in any application involving expansion, contraction, vibration or operational movement of the fault-current grounding path, where rigid grounding solutions may fall short. Ferrules are made from tin-plated pure electrolytic copper and the standard mounting holes are NEMA-spaced holes for easy installation. Stock products you can rely on—stock NSI.