German axle features: 1. 420×200, 420×180, 420×220 is available. 2. 6" Square Axle - 12mm standard wall thickness. 3. Axles are available with single wheel fixing or without brake. 4. Standard track length - 1840mm, other track lengths are also available. 5. Other wheel fixing are also available. 6. All axles include standard manual slack adjuster, auto slack adjuster is optional.