Knitter's Pride are changing their name/branding to KnitPro - you may receive either packaging. Knitter's Pride/KnitPro is one of the brands that describes their interchangeable cable lengths by the finished length once the tips have been added, not the cable itself. For example, the 40cm / 16" measurement is once two "special" length tips are added to either end, the cable itself measures 20cm / 8". The 50cm / 20" measurement is once two "normal" length tips are added to either end, the cable itself measures 28cm / 11". The 60cm / 24" measurement is once two "normal" length tips are added to either end, the cable itself measures 35cm / 14". The 80cm / 32" measurement is once two "normal" length tips are added to either end, the cable itself measures 56cm / 22". The 100cm / 40" measurement is once two "normal" length tips are added to either end, the cable itself measures 76cm / 30". The 120cm / 47" measurement is once two "normal" length tips are added to either end, the cable itself measures ~94cm / 37". The 150cm / 60" measurement is once two "normal" length tips are added to either end, the cable itself measures ~127cm / 50". Price is per pack, each pack includes one cord, two end caps, and one tightening key. Compatible with any Knitter's Pride tip - HOWEVER, keep in mind that if you have/are using 'normal' 4.5" - 5" length tips, they will be too long for the circular to comfortably form a circle once attached to the 40cm /16" cable. These cables are part of the Mindful collection.