S-8520B25MC-ARK-T2 S8520B25MC-ARK-T2 S-8520B25MC-ARKT2G S-8520B25MC-ARKT2U S-8520B27MC-ARM-T2 S-8520B27MC-ARMT2G S-8520B27MC-ARMT2U S-8520B28MC S-8520B28MC / ARN S-8520B28MC-ARN-T2