美国采购需求：粗蛭石、块状蛭石、植物用蛭石、细蛭石、块状粗蛭石、蛭石土

We are looking to purchase approximately 300,000 units of preserved products. Please provide us with your best quotes, along with any relevant details about available options, packaging, and delivery timelines. Additionally, we would appreciate information on any discounts for bulk orders and payment terms. It's important for us to ensure quality and consistency in the products, so please include specifications or samples if possible. Looking forward to your prompt response!