Spitzer Double Sharpener Castell 9000. Container material: plastic. Sharpener material: plastic. Ergonomic quality sharpener with shavings container, suitable for standard or jumbo-sized graphite and colored pencils. Container design: square container with hole closure. Container color: green. Sharpener shape: rectangular. Suitable for pencil diameters: 8 mm and 10 mm, tip shape: sharp-long and blunt-short. Sharpener color: red. Size (W x D x H): 32 mm x 20 mm x 70 mm.