Petzl Nano Traxion - OrangeIt sounds like you are referring to the Petzl Ultralegere Pulley. This pulley is indeed incredibly lightweight, weighing only 10 grams, and is designed for use in emergency kits, self rescue situations, and occasional use during rope maneuvers. Despite its small size and weight, it can still handle ropes up to 7mm in diameter and has a maximum working load of 1 kN. Details Weighing only 53 grams, this device is lightweight and easy to handle. It is