47237 Series Taper Gauge 0.5-11mm, made in Germany
CPT SPC v belt pulley, 3 grooves, 149.6mm outside diameter, 2012 taper bushing for 11mm~50mm shaft, cast material SPC140 03 2012|belt pulley|v belt pulleyspulley v - AliExpress
11mm Tapers | Etsy
1108 Series 11mm Bore 4 x 4mm Key Taper Lock Bush - Finer Power Transmissions