Used as a sheet return pulley on a 38 ', the workload is significant. The maximum price-load ratio is one of the best on the market; the rotation under load is perfect for a pulley without balls. Be careful however because the ends must not be too big 12mm maximum as indicated.
it seems to me to be a well-built block for cruising and I will use it as a replacement for a ball block that has deteriorated due to continuous reversals of pull of the sheet.