srd
SRD
Spell Resistance: This property grants the armor’s wearer spell resistance while the armor is worn. The spell resistance can be 13, 15, 17, or 19, depending on the armor.
Strong abjuration*;* CL 15th; Craft Magic Arms and Armor, spell resistance; Price +2 bonus (SR 13), +3 bonus (SR 15), +4 bonus (SR 17), or +5 bonus (SR 19).
Open Game Content from the System Reference Document 3.5, used under the Open Game License 1.0a.