There are only 10 of these Turbo Tops. Each one come in a custom numbered box. This version is made with Green Stardust, Citrine (UV), and Blue/Gold Dichro

They work with Tourbillons, T2, T4, T6, and all the enail Quartz. The Turbo Top is a 2-stage cap. One side completely seals the quartz bucket, and the other lets in a little extra air.