compatible with sram: level stealth 4-piston g2 guide compatible with avid: trail versions: 1. Organic / sintered steel 2. Organic / aluminum-coated 3. Sintered metal 4. Organic / steel powerful scope of delivery: packaging unit 1 set 1x pair of brake pads 1x spring 1x locking bolt 1x locking clip sram / avid disc brake pad identification (https://www.sram.com/globalassets/document-hierarchy/compatibility-map/sram-avid-disc-brake-pad-identification-guide.pdf)