Shubb Original capo, each C1b is Precisely machined of brass, but left unplated. because there is no coating that they have found which is durable enough to withstand the constant handling that a capo gets, therefore plain brass was the logical choice. This means that in time they will also age and darken with time. You get the same smooth function, tuning accuracy when applied to the guitar and the precise feel you get with any Shubb product.