RJ11 Male to RJ11 Female Extension Leads 1m to 30m Lengths – BCE Direct
MECCANIXITY Phone Extension Cord 1.64FT Telephone Cable Phone Line Cord RJ11 6P4C Plugs, Male to Male for Phone and Fax Black 2pcs : Amazon.co.uk: Electronics & Photo
Uvital Phone Extension Cord 33 Ft, Telephone Cable with Standard RJ11 Plug and 1 in-Line Couplers and 20 Cable Clip Holders, Black : Amazon.co.uk: Electronics & Photo