When replacing struts or spring seat units, always check the compression bumper and the dirt shield around the piston rod. These parts are included in the Monroe Protection Kit. Their role is important, but often forgotten. Dirt shields help increase the life of the shock absorber by protecting the piston rod in two ways: They allow draining of pollutants (water, mud, sand) to protect the piston rod coating They avoid shocks being impacted by stones, protecting the piston rod from surface damage The compression bumper improves the quality of the suspension thanks to its micro-cellular polyurethane foam. It allows optimum distribution of the car weight over the four suspended corners of the car by offering permanent dynamic loading. Each Monroe Protection Kit has been designed to protect newly installed shock absorbers. The compression bumper, made from highest quality close cells microcellular polyurethane, is designed for permanent dynamic loading. The dirt shield is made of thermoplastic polyurethane for long lasting protection of the piston rod against corrosion and impacts. A unique bumper attachment method ensures solid assembly and long service life. Legal Disclaimer We do not take any responsibility for the completeness and correctness of this information as many cars have multiple variations. Please supply your vehicle details on checkout so we can check the part is correct before dispatch. E & OE Manufacturer's Description Supplied as a pair to replace all s on the rear axle. This Protection Kit fits Mazda 121 MK III (JASM, JBSM) 1.3 built after 1st March 1996.