Keilim
Keilim or Kelim is the first tractate in the Order of Tohorot in the Mishnah. It contains thirty chapters, making it the longest tractate in the Mishnah. The Tosefta on Keilim consists of twenty-five chapters, divided into Bava Kama, Bava Metzia, and Bava Batra of Keilim. The tractate discusses the laws of ritual purity and impurity pertaining to all types of vessels.Chapter 1 clarifies the ranking of ritual impuritiesChapters 2–10 discuss earthenware vessels Chapters 11–14 discuss metal vesselsChapters 15–19 discuss vessels made of wood, leather, and boneChapters 20–25 discuss laws of purity and impurity for vesselsChapters 26–28 discuss laws pertaining to leather and clothingChapter 29 discusses the seams of clothing and vesselsChapter 30 discusses glass vessels.
There is no Gemara for Keilim in either the Babylonian or Jerusalem Talmud.
ArtScroll Mishnah Series has published a two-volume series explaining all of Mishnayot Keilim in English with many full-color illustrations.