Cisco1921/K9 w/ IP Business,2 GE,512MB DRAM CISCO1941-SEC/K9 Cisco 1941 Security Bundle w/SEC license PAK CISCO1921-T1SEC/K9 Cisco 1921 T1 Bundle incl. HWIC-1DSU-T1,256F/512D, SEC Lic CISCO1921-SEC/K9 Cisco1921/K9 with 2GE, SEC License PAK, 512MB DRAM, 256MB Fl CISCO1941-HSEC+/K9 VPN ISM module HSEC bundles for 1941 ISR platform CISCB/K9 Cisco1921/K9 w/ IP Business,2 GE,512MB DRAM CISCB/K9 Cisco 1941 w/ IP Business,2 GE,2 EHWIC slots,512MB DRAM CISCO1941-SECK9-RF Cisco 1941 Security Bundle w/SEC license PAK REMANUFACTURED ISM-SRE-300-K9 Internal Services Module (ISM) with Services Ready Engine ISM-SRE-300-K9= Services Ready Engine 300 (512MB MEM, 4GB Flash, 1C CPU) ISM-SRE-300-K9-RF ServiceReadyEngine300(512MB MEM4GBFlash1CCPU) REMANUFACTURED