https://stores.acrosales.com/multicore-core-solder-97sc-032-81mm-511-3c-one-pound-spool-mm01955-sac-305-sn96-5-ag3-cu-5/
Multicore Core Solder, 97SC, .032, .81MM, 511, 3C, One Pound Spool. (MM01955) (SAC 305)...
MM01955 Multicore Solder 511 3C flux .032 .81mm lead-free 97SC