Are 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 Ultimate - 2 x 16mm, 2 x 14mm Pistons, Seals, O-Rings 710845762680 11.5018.020.003 Level - 2 x 20mm Pistons, Seals, O-Rings 710845787096 11.5018.020.004 Level T, TL - 2 x 21mm Pistons, Seals, O-Rings 710845787102 11.5018.020.005 Level TLM, Ultimate - 2 x 21mm Aluminium Pistons, Seals, O-Rings 710845787119 11.5015.032.000 Elixir 1, 3, 5, 7, R, CR, X0, XX, XX WC - Pistons, Seals, O-Rings 710845613449 11.5018.007.002 X0 Trail, Elixir 9 Trail - All Small Parts 710845710988 11.5018.007.003 Elixir 7 Trail - All Small Parts 710845740312 11.5018.020.007 Code R B1, Code RSC A1, 2 x 15mm, 2 x 16mm Pistons, Seals, O-Rings 710845804373 11.5015.068.020 Code, Code R 11-17, Guide RE - Pistons, Seals, O-Rings 710845655890