Spool of Endless Rope
Some adventurers never seem to have enough rope. A spool of endless rope contains an unlimited amount of the finest silk rope, yet the whole spool weighs only a single pound. The spool comes with a belt loop so that it can be hung conveniently at an adventurer’s side.
To use a spool of endless rope, the owner feeds out as little or as much rope as desired, up to a maximum of 500 feet at any one time. When finished with the rope, the owner can simply wind it back onto the spool. (Feeding out or rewinding requires 1 round per 50 feet of rope.)
The rope can’t be entirely separated from the spool, though it can be cut or broken as a normal silk rope can be. Any portion of rope cut away from the spool disappears instantly, but the spool immediately replenishes the missing rope.
The rope from a spool of endless rope can be spliced or knotted together with another rope (including a rope from a second spool of endless rope), but the rope can’t be wound back into the spool while so attached.
Moderate conjuration; CL 9th; Craft Wondrous Item, Leomund’s secret chest;
Price 2,000 gp; Weight 1 lb.
Source: Complete Adventurer Pg 135