SRAM - Avid Brake Caliper Piston Kit - 2 x 16mm 2 x 14mm Pistons Seals O-Rings - Guide UltimateAre your SRAM of Avid Brakes feeling like they might need a freshen up? Pistons sticking? This is what you need! These are all genuine Avid or Sram Piston Kits. They include all necessary seals and o rings as per the pictures. SRAM PART # NAME BARCODE 11. 5018. 020. 000 DB5 2 x 21mm Pistons, Seals, O Rings 710845757976 11. 5018. 020. 006 Guide R, RS, RSC, T (A1 B1) 2 x 14mm, 2 x 16mm Pistons, Seals, O Rings 710845787126 11. 5018. 020. 002 Guide