This Cobra Crusher portable rock testing unit is listed in new condition and ships with free shipping. Designed for gold mining use, it may suit buyers looking for a compact unit for testing rock in the field or as part of a small-scale mining setup. The title identifies it as a portable unit, which can be useful for shoppers comparing handling and intended use. Because detailed specifications, size, materials, and included accessories are not provided here, check the listing for full details. This is a practical buying note if you want to confirm exactly what is included before purchase and whether it fits your mining or rock testing needs. "Cobra Crusher" Rock Testing Compact Portable Unit Gold Mining-NEW & IMPROVED!!. Condition: New. Listed at 449.00 USD. Our Cobra Crusher turns your Angle Grinder into a Mini Rock Crusher Plant with just a squeeze of the trigger. This unit in person is nothing less than amazing, turning sample rocks into a fine powder in just seconds.