This product is either discontinued or we cannot get that from suppliers.
STM Dux - Protective Cover STM-222-101L-01, Microsoft Surface, Aluminium polycarbonate, thermoplastic polyurethane (TPU), Black, Screen 12".
The STM Dux Case STM-222-101L-01 is perfectly suitable for Microsoft Surface Pro 3 model. The STM Dux provides best-in-class protection for your device.