Based on this product's specifications, here are some alternatives and similar models
Brush Carbon Pair for PRO vacuum THK30/THK30G 6.5×11.5×30.0 mm (2 pcs)
Summary description:
Replacement carbon brush set (2 pieces) for PRO vacuum cleaner models THK30 and THK30G. Each brush measures 6.5×11.5×30.0 mm and is intended for motor commutator contact in electric vacuum motors. Suitable for restoring brush wear, maintaining motor performance and extending service life. Sold as a pair for direct fit replacement.