RSP4/RSP4+ 256MB DRAM Upgrade Kit
Cisco RSP4/RSP4+ 256MB DRAM Upgrade Kit, 0.25 GB, DRAM, 168-pin DIMM
Cisco RSP4/RSP4+ 256MB DRAM Upgrade Kit. Internal memory: 0.25 GB, Internal memory type: DRAM, Memory form factor: 168-pin DIMM