Bare copper wire 250g roll - measured by mass, lengths are approximated 30 SWG (32/33 AWG) - 0.0124" (0.32 mm) Dia. Approximate length is 1150 ft. Includes: 1 Spool Copper Wire, Bare, 1150ft Reel, 30 SWG (32/33 AWG) - 0.0124" (0.32 mm) Dia. 250g roll - measured by mass, lengths are approximated