Mueller Electric WI-M-10-100-0 - Silicone, 10 AWG, "Coolflex 45" Wire, Black, 100' Spool
The WI-M-10-100 is a 100' of Mueller's "Coolflex 45" wire that is 10 AWG, 1064 strand 56/08x19C, tinned copper wire with a highly flexible 0.197" (5mm) diameter silicone jacket.