Lee Folding Primer Tray 2-Pack. Auto-Prime XR & Ergo-Prime users with tools purchased earlier than 2016 the 90794 XR/Ergo Prime Update Kit is required if you plan to use this Folding Primer Tray with your tool. This Folding Tray replaces PT1004 on the Pro 1000 and Load-Master and the Trays (PT1564 PT1538 PT2964) and Covers (PT1534 PT1470) from the Auto-Prime XR and Ergo-Prime tools. This Folding Tray will not replace the Trays on the Safety Prime with the round Trays. The Troughs are not compatible with the new Folding Trays and will not fit the new Folding Trays. Specifications for Lee Folding Primer Tray 2-Pack: Manufacturer: Lee Weight: 0.1 lb Package Contents: Lee Folding Primer Tray 2-Pack Lee 90606: Folding Primer Tray 2-Pack