The ART Ally redirect pulley with mobile side parts for use with the RopeGuide TwinLine. It is connected with 6 to 8 mm shackles and is suited for ropes up to 14 mm. Minimum breaking strength is 6 kN. The bearing is made of polyoxymethylene. This material is very sturdy with low friction. Thats why the Ally bearing runs very smooth without grease on an aluminium axis. The Ally is only an accessory pulley and not for PPE. Dont use it for personal protection!