Single 20 mm pulley with spring and trigger guard, ball bearings. - - Single 20mm pulley with spring and trigger guard.ball bearings.41mm lengthFor ropes from 2.5 to 6mmBreaking load 520 kgWorking load 115 kgWeight 15.4 gr. SINGLE STAND - UP FIXED ALLEN A2020LZ Product details Technical documents can be downloaded here