Genuine RHI&A PS10X21 roller chain sprocket, manufactured from durable steel. This industrial sprocket features 21 teeth and is designed for 10mm pitch chains, adhering to DIN 8187 / ISO 606 standards. Ideal for various power transmission systems requiring reliable and robust performance. Supplied with a pilot bore, ready for machining to specific shaft requirements. With an outer diameter of approximately 70mm, a width of 9.5mm, and weighing around 0.3kg, it offers precise fit and function.