All steel, raw center with chrome rim. Parts with two patterns listed are dual bolt pattern wheels. Inside nubs for 14"-16" caps is 7 1/2". Inside nubs for 17" & 18" caps is 7". Image shown with custom yellow powder coat, trim ring & 1940 Ford V8 cap for Smoothie, not included. Lug nuts not included. Optional custom powder coat, $35/wheel. Please check proper fitment before mounting. Doesn't fit Jeep Samurai.