The bottle refill should cost you in the neighborhood of 30-35 dollars. As goes for how long it should last is depending on the amount and if you use it right out of the whole. At 100 shot level expect 8-10 solid passes. 150 about 4-6 passes. You will not empty the bottle every time,it will just deminish the end result as you use it. Generally the first couple passes at that level will give the best results
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