This 6-piece piston and ring set features a 92.9mm diameter and 22mm pin bore, designed for use in select vehicles equipped with M272 or M273 engines, including CLK350, C350, E350, and GLK350 models with 3.5L V6 or 4.7L V8 engine configurations.Constructed from cast aluminum, the set supports efficient heat dissipation and function under normal operating conditions.The package includes six complete piston and ring assemblies suitable for engine rebuild or repair applications.Compatible part numbers include 2720308917, 2720304317, 2720302217, 2720309717, and 020419370501.Compression height is 30.43mm, pin bolt length is 52mm, and ring thicknesses are 1.5mm (first), 1.8mm (second), and 2.4mm (third).