Wire twisters (they know who they are) will recognise this and where it's from. Guy Rope, Cord, lashing, 100's of uses. told by an 'engineer' it's kevlar lined and has a strength good for a few ton.
eBay
5 Pieces Wire Tube Cable Thimble Winch Wire Rope Cable Wire Rope Thimbles
Aliexpress UK
2.0/2.4/2.7/3.0/4.0mm*15m Steel Wire Nylon Grass Trimmer Line Round Brushcutter Trimmer Rope Brush Cutter Wires Rope Accessories
Aliexpress UK
2～4.0mm*15m Steel Wire Grass Trimmer Line Round Brushcutter Trimmer Rope Brush Cutter Wires Rope Accessories
Aliexpress UK
Stainless Steel Wires Rope Metal Line Brushcutter Trimmer Clotheslines Ropes Lawn Mower Cord Wear-resistant Suspension Ropes
Aliexpress UK
M8 Elastic Dock Rope Buckle Kayak Rope Mooring Rope Marine Elastic Rope Anchoring Docking Rope Stretch Surf Rope
Aliexpress UK
15/30M Stainless Steel Cable Rope PVC Coated Garden Cable Guardrail Ropes Multifunction Railing Wire Fence Roll Sets With Screw
Aliexpress UK
5/8/10m garden plant tying rope green flexible garden support line reusable coated wire rope suitable for fixing climbing plants
Aliexpress UK
1Pc Aluminum Alloy Cylindrical Trimmer Head, Installation Hole 1Inch/2.54Cm, Side Fixed Lawn Rope Easy to Install, 3 Accessories and 4 Steel Wire Lawn Ropes, Strong and Durable, Not Afraid of Stones,
Aliexpress UK