You are buying 1 single brand new LS1 LS3 LS6 Cast Iron Valve Guides .313 X 500  4.8 5.3 5.7 6.0 GM 1999-2017. What you see in the pictures is what you get. Any questions feel free to ask.

I.D: .313 

O.D: .500

Length: 2.115"