Philips 560-013 TightRail Sub-C Mechanical Rotating Dilator Sheath, 13Fr X 6.1" / 15.5 cm Size, Device Inner Diameter 13.1F / 0.171" / 4.3 mm, Outer Diameter 18.4F / 0.239" / 6.1 mm, Outer Sheath Inner Diameter 22.9F / 0.297" / 7.6 mm. Box of 01