The material below is Open Game Content from a 3PP Source
Mithral Full Plate of Speed
Aura faint transmutation; CL 5th
Slot armor; Price 26,500 gp; Weight 25 lbs.
As a free action, the wearer of this fine set of +1 mithral full plate can activate it, enabling him to act as though affected by a haste spell for up to 10 rounds each day. The duration of the haste effect need not be consecutive rounds.
The armor has an arcane spell failure chance of 25%, a maximum Dexterity bonus of +3, and an armor check penalty of –3. It is considered medium armor, except that you must be proficient in heavy armor to avoid taking nonproficiency penalties.
Requirements Craft Magic Arms and Armor, haste; Cost 18,500 gp