SRD:Acid Resistance

Acid Resistance: A suit of armor or a shield with this property normally has a dull gray appearance. The armor absorbs the first 10 points of acid damage per attack that the wearer would normally take (similar to the resist energy spell).

Faint abjuration; CL 3rd; Craft Magic Arms and Armor, resist energy; Price +18,000 gp.

Acid Resistance, Improved: As acid resistance, except it absorbs the first 20 points of acid damage per attack.

Moderate abjuration; CL 7th; Craft Magic Arms and Armor, resist energy; Price +42,000 gp.

Acid Resistance, Greater: As acid resistance, except it absorbs the first 30 points of acid damage per attack.

Moderate abjuration; CL 11th; Craft Magic Arms and Armor, resist energy; Price +66,000 gp.