(OKI P/N 70061901) 512MB DDR2 144Pin Memory RAM for OKI Color Printer MC361, MC561, CX2731, C330dn, C530dn, C610n, C610dn, C610dtn, C610cdn 512MB OKI printer memory upgrade Part#: 70061901 100% Compatible with Lifetime Warranty Manufactured by Keystron, LLC Keystron is a registered trademark of Keystron, LLC