According to Gumout, this product has the highest level of PEA you can get from them. All of the other Gumout FI cleaners have a lower amount. Quantity-wise, the only way to beat this is to get the Gumout One-N-Done, which is a 20oz bottle you can occasionally find on Amazon for less than $10USD. Right now, however, Amazon doesn't have any and the cheapest supplier is $32, which at that price I'd take 2 bottles of Redline SI-1 instead.