Material Type: Nodular Cast Iron OEM Code: 79030231044 Size: 78mm Diameter Bore Size: Standard Package Including: Piston & Ring Kit Fitment: 250 EX*-F, SX-F, XC-F, SXF FACTORY EDITION models The piston rings are constructed from nodular cast iron, a material known for strength, durability, and resistance to wear.This composition supports performance under demanding operating conditions.Designed specifically for 250 EX*-F, SX-F, XC-F, and SXF FACTORY EDITION models, the rings contribute to consistent engine and efficient energy conversion.Engineered to endure temperatures and pressures typical in performance applications, the 78mm diameter and standard bore size proper fitment across compatible motorcycles.The piston design helps reduce thermal expansion and improves heat dissipation, supporting sustained engine efficiency and service life.Each set is manufactured to meet established quality standards and is verified to comply with SGS ISO9001 requirements.These piston rings provide a functional upgrade for riders seeking dependable performance from their motorcycle engines.