DC Barrel Plug Adapter to 2.1 x 5.5mm mono plug from 2.5 x 5.5mm; Part #: RC-X2155C1
DC Barrel Plug Adapter to 2.1 x 5.5mm mono plug from 2.5 x 5.5mm; Part #: RC-X2155C1

DC Barrel Plug Adapter to 2.1 x 5.5mm mono plug from 2.5 x 5.5mm; Part #: RC-X2155C1

by PHC Enterprise, Inc.
$3.00

Part #: RC-X2155C1

In: 2.5 x 5.5mm

Out: 2.1 x 5.5mm

Gauge: 18awg

Cable length 3".  Converts DC plug from (socket) 2.5 x 5.5mm to (plug) 2.1 x 5.5mm mono.  

Simple solution to changing your power supply's DC plug size without soldering.