From the Manufacturer
This is a four pack of blister carded curve track pieces for use with the UNITRACK N gauge track system? The Curve radius and degree descriptions describe what portion of a complete circle (360º) is made from each section and how big that circle will be (in this case approximately 22″, or double the radius? Radius measurements for curves such as these are measured from the center point of a circle to the center line of the track, making it easy to keep track of how large your layout will be when you’re still in the planning stages!
KATO UNITRACK uses a special alloy of nickel silver to prevent tarnishing and reduces the frequency of cleaning that is required
The Unit-joiner, a removable wired connector clip, is the basis for KATO UNITRACK’s worry-free design
Convenient single track pack for expanding from the track sets
Reliable and easy-to-use UNITRACK track system makes setting up both temporary and permanent layouts a “snap”