Suttle 630LCCU-50 1-Line Wall Mount Adapter DSL Filter (Pins 3&4) with Auxiliary Unfiltered Jack, Ivory, Compatible with ADSL and ADSL2+, 2-pole Low Pass Filter Topology Compatible with ADSL and ADSL2+ 2-pole low pass filter topology Contacts (plug and jacks) minimum 50 microinch of gold and nickel Customer installable