The master-cylinder and caliper are hard working assemblies and generally durable over the long term; however they will require refurbishment over time, new seals, pistons, replacement unions, banjo bolts pads, pins and return springs being just a few of the components you may require.
If you are considering a refurbishment of these vital assemblies, both for sound mechanical and cosmetic improvement then this component, and perhaps some of those listed below, maybe required?
Add as many components as you wish to the same shopping cart, new bolts 5914516700 return springs 5914316700 pins 6914145000 bleed screw 5912118410 & clips 6914245000 for example, and still only pay the same single fixed price shipping cost. This component may have other, sometimes unrelated, applications within the Suzuki model range. So, please always check by the part-number rather than the description. If you are carrying out engine work try this recommended pro-workshop gasket sealant 08C70K0234M?