SQL Query - Multiple records from value of field

I have a table that has the following lay out

ID	AreaUnitServes	Filter1Quantity	Filter1Size	Filter2Quantity	Filter2Size

And I’m trying to convert it to

FkPSAUnitsID	Size	Location

I’ve got the following query started but I’m stuck on how to INSERT INTO multiple records by the value of Filter1Quantity. I also have to query for Filter2Quantity.

INSERTINTO RapidServ.dbo.PSAFilters

(FkPSAUnitsID,Size,Location)

SELECT ID AS FkPSAUnitsID,Filter1Size AS Size,

AreaUnitServes AS Location

FROM RapidServ.dbo.PSA

Thanks,

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why767