Alchemical Armband (3.5e Equipment)
From D&D Wiki
Alchemical Armband: An armband to be placed around the top of the arm. It allows the user to transmute their arm into that of another race or material, getting the strength and damage bonus with that arm.
Moderate transmutation;CL 10; Must have at least 5 ranks in alchemy.; Cost 2,500 gp, 12,000 EXP; Weight: 5 lb.; Market Price: 17,500 gp