Thw ARC-100 ball washer, made by American Range is basically the Range Master WS-100 ball washer with a few adjustments. The WS-100 became the RM-100 ball washer here at range Mart. We have the last produxtion run of several components. We will continue to manufacture parts after this inventory is gone, However, the quantities will be smaller, driving costs up. So, now is the time to get what you need.