For Sram GUIDE Level db5 Bicycle Brake Lever Internals Rebuild Piston Assembly
Long：SRAM DB5, Level,Level T/TL/TLM/ULT,Guide T/R/RE/RS,Code R(2018). The piston of the SRAM factory may expand, and aluminum does not have this problem. Aluminum Piston Assembly include seal ring. seal from World famous seal manufacturer TSS.