SRD:Amulet of Health

Amulet of Health: This amulet is a golden disk on a chain. It usually bears the image of a lion or other powerful animal. The amulet grants the wearer an enhancement bonus to Constitution of +2, +4, or +6.

Moderate transmutation; CL 8th; Craft Wondrous Item, bear’s endurance; Price 4,000 gp (+2), 16,000 gp (+4), 36,000 gp (+6).