Koolance HOS-10BK Tubing, PVC Black, Dia: 10mm x 13mm (3/8in x 1/2in), Ea: 305mm (1ft) Koolance black PVC tubing with 10mm (3/8in) internal diameter, 13mm (1/2in) external diameter. Bend radius is approximately 37mm (1.5in). This tubing is priced per foot (305mm) and will be cut to the ordered length. Additional Specifications &bullet; Max Temperature: 70&deg;C (158&deg;F) &bullet; Max Pressure @ 25&deg;C: 5kgf/cm2 (71psi).