ITEM NAME:22mm/0.87inch Dia. Alloy Bicycle Caliper Pad Brake with Seal Ring, Disc Plate Description: Made of alloy, high temperature resistance and durable for long time use. Suitable to Shimano M675/M7000 XT M785/M8000/RS805/RS815 XTR M9020 brake. Compared to ceramics piston, it can resistant 300℃ temperature and leakproof with accompanied oid tube. With 4 holes to radiate and reduce heat transfer contact area, the brake pad can dissipate heat efficiently. The sunken back can gather thrust force into central part, so that the piston and sealing ring will move synchronously. Specification: Material: Alloy Diameter: 22mm/0.87inch Package Includes: 1 Piece of Brake Piston 1 Piece of Sealing Ring Note: Please allow slightly measuring deviation due to manual measurement. SKU: DMO0013587754038540.Material: Alloy. The sunken back can gather thrust force into central part, so that the piston and sealing ring will move synchronously. Suitable to Shimano M675/M7000 XT M785/M8000/RS805/RS815 XTR M9020 brake.