Soldering tip adapter With the soldering tip adapter, LT series soldering tips can be used in older WELLER soldering irons. PT*-/C-x-* for TCPS, TCP 12, TCP 24 ET-/EW- for LR 21 MT-/DX- for MLR 21 - for holding WELLER LT soldering tips - suitable for older WELLER soldering irons - type:ET-LT for LR 21 - temperature range:-°C - 1 piece tip sleeve - 1 piece soldering tip adapter