Welcome to Riskfreememory.co.uk Shop online for Memory in the UK at the best prices. Order with Riskfreememory.co.uk with a secure online form for next day delivery. Riskfreememory.co.uk is a division of RiskFree (UK) Ltd. 19K4654 Memory/256MB 133MHz nPar SDRAM DIMM For Thinkpad T23 doesnt fit T20 T21 T22 (RF639940-MF-19K4654-IBM-Memory-Memory) Manufacturer Code: 19K4654 Our Code: RF639940 Price and availability Order this product Search for more items Please click Price and availability for up to date pricing. To browse through over 20,000 products available please visit www.riskfree.co.uk/shop.