Voliminal: Inside the Nine is the third video album by American heavy metal band Slipknot. Released December 5, 2006 by Roadrunner Records, the 2-disc DVD set features an 84-minute movie created by band member Shawn "Clown" Crahan. The set also includes live performances, music videos from songs on the band's third studio album, Vol. 3: (The Subliminal Verses), and the first unmasked interviews with all of the band members.

The movie featured footage recorded from the recording of Vol. 3: (The Subliminal Verses) through the end of the tour in support of the album spanning a total of 28 months. The DVD was promoted on various websites for the weeks leading up to its limited theatrical release. Critical reception of the album was mixed. Dawn wrote the album has "a raw sound" calling it "an audible treat for thrash and speed metal fans"; however, Billboard would tell fans to "save your cash for the band's next tour". Voliminal would be certified gold, platinum, and double platinum in Australia, the United States, and Canada respectively.