This is a 3 piece billet aluminum set. The power steering unit, and radiator unit are both covers, going over the stock caps. These are a press fit, but come with a heat stable double sided tape pre-applied should you choose to use it. The brake unit is a full replacement for your brake reservoir cap. They are machined from 6061 aluminum stock.

They are available in 6 different anodized finishes - Red, Blue, Black, Purple, Gold, Clear.