Dimension: The size of these carbon brushes is about 6 x 9 x 21 mm. Compatible with Bosch GBH 2-20 D/ GBH 2-18 RE/ PBH 2000 RE/ PBH 2000 SRE/ BPH 2800 RE/ PBH 2900 RE/ PBH 3000 FRE/ PBH 3000-2 FRE electric hammer drill. High strength, long service life, low sparking. Carbon brushes are easily worn motor parts and should be replaced regularly due to the friction between the electric drive and the carbon brushes during daily use.