Select   '</br> Netto gewicht '|| cast(fnettoweight as numeric (12,3) ) ||' kg</br><b>' LINE 
from stock  where fnettoweight <> 0 and wStockid =  <@WSTOCKID@>
union
Select   '</br> Bruto gewicht '|| cast(FGrossweight as numeric (12,3) ) ||' kg</br><b>' LINE 
from stock  where FGrossweight <> 0 and wStockid =  <@WSTOCKID@>