Kato 3-115 HO Scale HV5 BASIC OVAL TRACK\nThe HV5 (previously the 3-102 basic track oval) creates a basic oval made from 21-5/8″ track to fit within a 4′ x 8′ space and includes a rerailer accessory, feeder track and power adapter cord to allow you to build a basic oval layout that can easily be powered and expanded upon.\nBy combining this set with the HO HM1 R670mm (26-3/8″) Basic Oval Track Set and other single Unitrack items, there are many possibilities for expansion.