Kato USA Model Train Products M1 UNITRACK Basic Oval with Kato Power Pack The M1 Basic Oval track set consists of a 3' x 4' oval of Kato UNITRACK (12 3/8" radius curves) with rerailing track section and a Kato Power pack Couple the M1 with any of Kato USA's "Starter Series" train sets or individual locomotive and car releases to customize your own starter set Easy-to-transport box with carrying handle Reliable and easy-to-use UNITRACK snap track system makes setting up both temporary and permanent layouts a snap