美国采购需求：批发供应合成石墨块，石墨块

We're looking for isotropic graphite blocks specifically designed to create glass-to-metal seals for Kovar packages. The application operates at a temperature of 1200°C within a nitrogen environment, so the material must withstand these conditions effectively. Please provide a quote for the standard sizes you have available, as well as for blocks measuring 300mm x 300mm x 300mm. We're eager to understand your pricing and any relevant specifications that might assist us in making a decision. Looking forward to your prompt response!