The Accossato rear brake master cylinder with Integrated fluid reservoir is in CNC-worked aluminium with superficial hard oxidation treatment in black colour. The Piston diameter is 13.5 mm. The distance of the fixing hoses is 40-50 mm. Brake hoses fitment is 10 mm. We do not recomment to mounting it with the thumb rear brake master cylinder. Tank capacity is 15 ml and the cover, made in CNC-worked aluminium too, is available in 7 different colors.