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. 19K4656 Memory/512MB 133MHz nPar SDRAM DIMM For thinkpad T23 doesnt fit the T20, T21 and T22 (RF639941-MF-19K4656-IBM-Memory-Memory) Manufacturer Code: 19K4656 Our Code: RF639941 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.