Shimano B01S Resin Disc Brake Pads - Blue Sky Cycling
Shimano Shimano B01S Resin Disc Brake Pad and Spring, 4th version of B01S pad, fits many Deore, Alivio and Acera Calipers - Philbrick's Ski, Board, & Bike
Shimano B01S Disc Brake Pad Set - Gary's Bikes
Shimano B01S Resin Disc Brake Pad and Spring – Alaska Bicycle Center