Accessory Belt Tension Pulley for BMW 3-Series 92-06 / M6 06-08 80 mm O.D. 10.2 mm I.D. 24.5 mm W Flat Steel FREE 1-year UNLIMITED mileage warranty coverage on Evan-Fischer items purchased thru AUTO PARTS GIANT Store A high quality, Direct Fit OE Replacement Accessory Belt Tension Pulley from Evan-Fischer 3.15 in. OD; 0.4 in. ID; 0.96 in. W; Flat; With steel flange