The “R” Type 4 blade is constructed similar to SK type but with all steel blades. The diameters manufactured are 610mm (24”), 762mm (30”), 914mm (36”), 1067mm (42”) & 1219mm (48”) with pitch angles of 20-27 degrees and giving a performance range of 2000 to 45,000m3/h. Clockwise rotation only on this type which have taper-lock hubs for safety and ease of removal.