Hobart #186419R
(Previously Hobart #186419)
Fits the following welding spool guns:

SpoolRunner 100 (#300796 - For the Hobart Handler 190 & Handler 210MVP wire welders)
Spoolmate 3035-20 (#300143 - For the IronMan 210 wire welder)
DP-3035-10 (#300199 - For the Handler 210 wire welder)
DP-3035-20 (#300173 - For the Handler 210 wire welder)