This one-piece shaft collar has a 24mm bore, 45mm OD, and 15mm width.
.Shaft Collar, 1pc Clamp, Bore 24mm, OD 45mm, Anodized Aluminum Tightly controlled face to bore perpendicularity is maintained (TIR of Ruland clamp style shaft collars do not mar the shaft, are infinitely adjustable, and have superior holding power when compared to set screw collars.