In java using OSHI. how to determine the allocation unit size or block size for virtual memory in windows.

im able to get the allocation unit or partition or block size for all drives in the pc . using

Map<String, List> blockInfo = WmiUtil.selectStringsFrom(null, "Win32_Volume", "Name,BlockSize", null);
List blockSize = blockInfo.get("BlockSize");

Now my need is i need to get the block size for virtual memory too. using win32_volume im not able to get the block size for virtual memory.