Mahle OE plain second-ring set for a 3.4252 in bore provides a 1.5 mm edge-width grey iron second ring as a replacement part. It's specified as the second ring in a piston ring pack and is meant for restorations or repairs where that bore and ring width are required. The overview highlights accurate sizing to help ensure a proper match with corresponding pistons.
Mahle Rings 3.4252in X 1.5MM Edge Width Grey Iron BT Second Ring Plain Ring Set