Inserting Variable Number of Rows

[bundyloco]

I'm trying to create a chunk of code that copies an entire row and then inserts a variable amount. here is the code

insertrows = 3 + prodlength
Rows("3:3").Select
Selection.Copy
Rows("4:insertows").Select
Selection.Insert Shift:=xlDown

Is it possible to do something like this? I'm trying to do this method because it copying and inserting rows preserves all the formatting. The variable prodlenght is the number of products found off another worksheet in the workbook.