HP PN - FB355UA#ABA - In the US.
US 16GB: FB355UA#ABA (non "smart buy" part number) FB454UT#ABA ("smart buy" part number) US 32GB: FB356UT#ABA ("smart buy" part number) FB359UA#ABA (non "smart buy" part number) UK 16GB: FB405UA#ABB UK 32GB: FB368UA#ABB DE 16GB: FB405UA DE 32GB: FB368UA