Check the listing for details. 2WIRE DSL Phone Filter Kit LFT 4-1 WM (3) InLine (1) Wall Filter 1 Adapter. Condition: Open box. Listed at 3.99 USD. The 2 Wire DSL Phone Filter Kit includes an inline filter and a wall filter, along with an adapter, designed for use with DSL and phone lines. Specifically compatible with the LFT 4-1 WM model, this kit from 2 Wire ensures clean and filtered signals for optimal networking performance.