These fixed grinding core pieces are made from nylon. Designed to enhance the grinding process, these parts ensuring consistent grind, making them ideal for coffee enthusiasts who appreciate a well-brewed cup of coffee. Features -Color:Black -Material:Nylon -Size:2.50X2.50X2.20cm/0.98X0.98X0.86in -Sturdy construction: made from lightweight nylon, these fixed core pieces are built to withstand regular use -Stable and secure: the black fixed core pieces ensuring a stable and secure fit -Effortless replacement: easily replace these fixed core pieces whenever necessary -Compatible: designed to be compatible with portable coffee grinders, these core pieces offer easy installation -Consistently: enjoy a sturdy coffee grinding experience with these fixed core pieces, producing consistently fine and flavorful coffee grounds Package list: 4 x grinder core pieces