Led Zeppelin announced on Twitter it will release a limited-edition 7″ yellow vinyl single. The vinyl will feature previously unreleased mixes of “Rock and Roll” and “Friends” in light of Record Store Day on April 21, 2018.

According to a press release, this mixture of “Rock and Roll” stems from the “Sunset Sound Mixes” made for Led Zeppelin IV, of which only two tracks have been heard before: the original version of “When the Levee Breaks” and “Stairway to Heaven,” which appeared as a special mix on the 2014 Deluxe Edition of Led Zeppelin IV. The “Olympic Sound Mix” of “Friends” removes the orchestration, “offering a true fly-on-the-wall feel from the band’s recording sessions for Led Zeppelin III at Headley Grange,” according to the release. Jimmy Page produced both recordings.