【Improve Roasting Quality】：By sorting coffee beans into consistent sizes, this sieve ensures even heat distribution during roasting for a more uniform roast and better flavor development. The precision-machined apertures deliver accurate grading, helping you achieve professional-quality results every time. 【10-Grade Precise Sifting System】：Features 10 interchangeable, stackable sieves for multi-level grading: 21 mesh (8.33 mm), 20 mesh (7.93 mm), 19 mesh (7.54 mm), 18 mesh (7.14 mm), 17 mesh (6.74 mm), 16 mesh (6.35 mm), 15 mesh (5.95 mm), 14 mesh (5.55 mm), 13 mesh (5.15 mm), and 12 mesh (4.76 mm). 【Premium Wooden Frame & 304 Stainless Steel】：Constructed with a sturdy wooden frame and high-quality 304 stainless steel mesh. Built with precision laser cutting, integrated molding, and stamping technology for a smooth, burr-free surface and long-lasting durability. 【Easy to Use & Effortless Bean Release】：Beans glide smoothly during screening for efficient sifting. The patented bean outlet design allows quick and clean pouring. Equipped with a magnetic stainless steel plate for a secure seal and easy one-hand operation. 【Sturdy Aluminum Alloy Carrying Case】：Comes with an elegant aluminum alloy hard case with a secure lock for safe portability. High-density foam on the top provides excellent shock absorption, while the precision-fitted bottom base offers drop resistance and long-term durability.