Reeds & dents
A weaving reed is a steel comb (usually a plastic comb on a rigid heddle loom) that separates the warp threads at the correct density for the warp width. In the U.S., reeds are designated by the number of spaces (dents) per inch. For example, they can be 6, 8, 10, 12, 15, etc. A 12-dent reed has 12 dents per inch. The reed is held with the beater and is used to place the weft at the fell of the woven cloth.
A dent is the slot in a reed. The warp is threaded through the dents.
This reed is sleyed and ready to go.