Drag Chain, also known as energy chain or cable carrier which is widely used in XYZ cnc machines, are guides designed to surround and guide flexible cables and hydraulic or pneumatic hoses connected to moving automated machinery. They reduce wear and stress on cables and hoses, prevent entanglement, and improve operator safety.
It's different from Spiral Cable Wrap, Fabric or Plastic Insulation which is for small pieces of lead wires. The drag chain are stronger protection for frequently moving X axis and it seems that it's not workable on delta robot 3d printers.
Drag Chain is available in three inner sizes
15x20mm inner (20x28mm outer)
10x15mm inner (23x16mm outer)
QTY 1 = 1 meter long drag chain
QTY 2 = 2, 1 Meter long drag chains. (they can be assembled together)