LAST CHANCE BEFORE IT GOES TO MELT. As detailed on Michael Good?s own website, ?The form that started it all, the HPE, or Hyperbolic Paraboloid Extension, has been representational of Michaels? work since the beginning as an iconic form as well as our logo.? This is not the ?mini? but the full size (3+ inches in length) and weighs almost exactly 1/2 Troy ounce of 18K gold. Taking into account the ends of the cord and the catch, it?s certainly 1/2 Oz Troy in total weight. The ? mini HPE? seems to weigh approximately 1/3 of the weight of the full size although we don?t know for sure and retails for $1,500+. This was an estate sale find at a very upscale estate sale. While not one of a kind, these were custom made individually by Michael Good. The cord is not metal but cotton or similar and is approximately 24 inches in length and the ends are 18K gold. Please note we have photos of measurements and we have an added photo of a US quarter coin to show how large the pendant actually is. Will go through the Authenticity Guarantee with to allay any concerns for the buyer. At some point this item will be taken down and sent to the melt. If it?s still listed, it?s for sale but inventory has to move or be moved. Will ship USPS with tracking to winning buyer. We will require a Signed Delivery Receipt BY THE BUYER at delivery. We will message through a reminder of the expected delivery date. This is designed to protect both buyer and seller and seller will pay for the receipt.