Product Type 300A Electrode Holder 500A Electrode Holder Minimum Welding Rod Size: 1/8 in - 5/32 in 7/64 in - 13/64 in Minimum Welding Cable Cross-Section Supported #4 AWG - #2 AWG #2 AWG - 1 AWG Product Dimensions 9.45" × 3.43" × 1.38" 10.59" × 3.50" × 1.46" Weight 365g 433g Single Package Dimensions 10.79" × 3.70" × 1.65" 10.79" × 3.70" × 1.65" This heavy-duty Electrode Holder is designed for professional welders who demand durability, safety, and performance. Made with H59 copper alloy, it delivers excellent conductivity and corrosion resistance. The fiberglass-reinforced cap resists temperatures up to 240°C, while the dual-color nylon + PP handle provides heat resistance up to 125°C and a comfortable, non-slip grip. Features: High-Quality H59 Brass Tip – 58.5%-60.5% copper for stable arc performance 240°C Heat-Resistant Cap – Fiberglass-reinforced for thermal protection 125°C Ergonomic Handle – Nylon and PP dual injection for comfort and durability Excellent Insulation – 500MΩ resistance after humidity treatment Safe Under Load – 1000V dielectric strength for industrial-grade protection Smooth Temperature Rise – Tested at 39.3K with max rated load area