6pcs Pistons & Rings Set A2720304017 A2720301018 2720300117 2720303717 for E-CLASS W212 W211 M272 E25 E30 Engine This 6pcs Pistons & Rings Set is designed for use with M272 E25 and E30 engines found in E-CLASS W212 and W211 models.Made from forged aluminum, the pistons are paired with steel rings to support engine.The set features a standard 0.00 specification with no fit cylinder expansion, maintaining consistent clearance during.Each piston has a cylinder bore of Φ88mm, a bolt diameter of Φ22mm, and a bolt length of 48mm for precise fitment. The package includes six pistons and corresponding rings, with ring thickness options of 1.5mm, 1.8mm, and 2.5mm to accommodate different rebuild requirements.This configuration supports accurate assembly and efficient combustion performance.The design allows for straightforward installation, suitable for both professional and experienced DIY applications.This piston and ring set provides a functional solution for engine repair or performance restoration. This is a compatible aftermarket component.Brand names are cited solely to show which devices it works with.