Derwent 24 Piece Pastel Collection. Derwent 24 Piece Pastel Collection. Discover the vibrant beauty of the pastel medium with this versatile collection of pastels and pastel pencils. They offer both convenience and control with complete freedom of expression – a perfect combination. This unique collection contains everything you need to create vivid, expressive pastel drawings. Tin Contents: 14 Pastel pencils, 7 Pastels (blocks), 1 kneadable eraser and 1 pastel pencil sharpener.