4 Core Black Flex-2.5mm-100m : Amazon.co.uk: DIY & Tools
electrosmart 100m Quality 2 x 18 AWG Loud Speaker Cable - Multi-Strand with Red Polarity Indicator Outside Dimensions of Cable: 5mm x 2.5mm: Amazon.co.uk: Electronics & Photo
100 Meter Twin & Earth Cable 100m x 2.5mm Electrical Cable T & E Electricians : Amazon.co.uk: DIY & Tools