Brake brake set consisting of Shimano T8100-4-pistons and 2-pistons. Optimal braking performance with minimal weight - for the highest performance. Shimano J-kit-for fast, clean and simple braking assembly. The pre -assembled system is already filled with brake fluid and is perfect for frames with internal -laying lines. Saving time in assembly - the line only has to be connected to the brake lever before installation. You can return old batteries that we have as new batteries in our range, free of charge at our shipping camp (shipping address). The symbols depicted on the batteries have the following meaning: The symbol of the rubbed garbage can means that the battery must not be added to household waste. PB = battery contains more than 0.004 mass percent lead CD = battery contains m.