For general lab use and low voltage hook-ups.
1m 3.3ft, 30mm Flat Copper Braid cable,Bare copper braid wire, ground – elecify
Earth Ground Wire Cable 35mm2 50mm2 70mm2 Bare Copper Conductor - China 70mm2 Bare Copper Cable, Bare Copper Cable
BULK, 12 Gauge, Bare Copper Craft Wire, 1 LB (50 Feet)
Southwire 315 ft. 6-Gauge Solid SD Bare Copper Grounding Wire 10638502 - The Home Depot
24 GA Bare Copper Wire 100 ft Spool (Dead Soft)
Southwire Bare Copper Grounding Wire, 6 AWG, 315 ft, None Insulation 10638502
Find 14 Gage, 0.0641 Diameter x 1,200' Long, Bare, Copper Bus Bar Wire at MSC Industrial Supply, serving the metalworking, safety, and MRO industries
14 Gage, 0.0641 Diameter x 1,200' Long, Bare, Copper Bus Bar Wire
Southwire BARE-SD-2-7STR-1000R BARE-SD-2-7STR-1000R
Suitable for crafts such as jewelry and weaving or for electrical grounding wire use Greater than 99 percent pure copper Uninsulated single-strand
Bare Copper Wire, Annealed, 1lb Spool, 18 AWG, 0.0403 Diameter, 195' Length (Pack of 1)
Southwire By-the-Foot 18-Gauge Stranded SD Bare Copper Grounding Wire 55024790 - The Home Depot
Stranded Bare Tinned Copper Cable #BCQ2_1363