3M Disc Pad Holder 9145, 4-1/2 in x 1/8 in x 3/8 in x 5/8 in-11InternalGeneral Information Brand 3M Abrasive Attachment Type Hook & Loop Function Attachment Style Hook & Loop, Non Woven Abrasives Hook Type 7 Product Type Back up Pad Type Regular Country Of Origin United States Lead Time 2 days California Residents Proposition 65 Warning Dimensions and Specifications Center Hole Diameter (Imperial) 0. 375 in Center Hole Diameter (Metric) 9. 525 mm Maximum Speed 13000 mps Net Weight (Imperial) 0. 22 lb Net Weight (Metric)