The Plasma Shaft is a compilation box set of the rare Red Hot Chili Peppers material. It was released in Australia and Japan as a bonus to Blood Sugar Sex Magik in a separate jewel case on June 27, 1994. It contains two discs: the normal Blood Sugar Sex Magik disc with all 17 tracks, and a bonus disc with 8 tracks recorded during the sessions for the album. All of these were already released as B-sides to various singles, including the hit single “Soul to Squeeze”