Released in a limited edition of 12 pieces, the Urwerk UR-105 TTH ‘Tantalum Hull’ marks the final edition of the UR-105 model. Cased in the UR-105 CT ‘soap bar’ —due to its shape reminiscent of a soap bar— the case is made of titanium and tantalum. Measuring 39.5 mm wide by 53 mm long, the new Urwerk UR-105 TTH 'Tantalum Hull' is sporting one of our favorite metals.