The Moxi Mixtape Bearings sound so good! They are a pack of 16 bearings that come in a real cassette case. Their friction-resistant derlin retainers are serviceable and they're teal and purple.  Inside they used chrome steel balls that are pre-lubricated and spun with the thinnest high-speed oil that they could find. They heat-treated the balls to keep their roll performance high. Made by caring rollerskaters that want more speed whether it be on a ramp, in the streets, rink, or in derby!