100Ft & over includes a plastic spool - 50Ft & under is hand winded Specification writing on wire Made in USA Tinned copper wire Tefzel Perfect for race car applications and aviation. 100ft Mil-Spec wiring cable 16 Gauge Tefzel M22759/16-16 AWG Size 16 Conductor Stranding 19/29 No. of Cond. 1 Min O.D. (in) 0.077 Max O.D. (in) 0.081 Approx LBS/MFT 10 M27500 Component TE Mil-Spec M22759/16 SAE Spec AS22759/16 Cond. Material Tinned Copper Insul. Material Ethylene Tetrafluoroethylene (ETFE) Max. Temp 150°C Made in USA authentic military grade wire (spec writing on wire M22759/16-XX-X) Made in USA authentic military grade wire (spec writing on wire M22759/16-XX-X)