It took me a while to match it up, but that appears to be this #18 E-Series Root Grapple | MS Attachments model. The company is based in North Carolina but their new prices before shipping are less than what those "unused" are shown for.
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Found this posted locally on facebook. Looking for a grapple for my new Kioti CK2410. What do you pros think? I'll be scooping up logs, brush, etc.