Arborist-specific: The Big 8 Rescue Descender meets CE and UIAA standards and is rated at 11,240 lbs. tensile strength. Made from high polished stainless steel, this descender can be used in an array of activities including arboriculture, rescue, recreational climbing and more Features & Specs: MPN: USR-850-S MBS: 50 kN (11,240 lbs.) Rope Size: 11 -16 mm Finish: High polished stainless steel Weight: 1.63 lbs Color: Silver