Magic Weapon Abilities - Spell Resistance SR19

This enchantment grants the armor's wearer spell resistance while the armor is worn. The spell resistance can be SR 13, SR 15, SR 17, or SR 19, depending on the armor. For SR 19:
Aura: Strong abjuration
Caster Level: 15th
Requirements: Craft Magic Arms and Armor, Spell Resistance
Price: +5 bonus
Dungeon Master's Guide v.3.5

About Magic Weapons