Diago Green Adapator 2.5mm (Stock  Ref: 1723)   £5.95 inc VAT

Diago Green Adaptor Use it to power Line 6 Stompbox Modelers (DL4, DM4, FM4 & MM4) Reverses polarity to a centre +ve, 2.5mm barrel plug Buy as many as you need, one for each pedal Just plugs on to your existing daisy chain cable