This is a test stand for presenting and servicing 1 Gauge locomotives with up to 4 powered axles. The test stand is constructed of anodized aluminum shapes. The roller brackets have precision ball bearings. 1 Gauge track is included. Locomotives on the test stand can be operated with a conventional train control transformer, Märklin Digital, or Märklin Systems. Total length 650 mm / 25-9/16". Usable length about 590 mm / 23-1/4".