The Koolance 3/8" (10mm) ID Tubing Wrap - Red is a tubing outer spring designed to help avoid kinks in tight areas. Steel with red plastic coating.
For 10mm (3/8") internal diameter, 14mm (0.55") external diameter Koolance systems. Length is pre-cut to work for tubing segments between 6-32" (15.2-81.3cm).