33 Knot Prayer Rope. 
Used to say the Jesus Prayer, "Lord Jesus Christ, Son of God, Have Mercy on Me a Sinner." 
 
Comes with small booklet "Comboschini (The Prayer Rope)" explaining the origins and significance of the Prayer Rope.  A superbly written and magnificently illustrated (iconographically) booklet on the meaning of the prayer rope, how to use it, the fruits of the Jesus Prayer, etc. 4 1/2" x 6".  31 pages.