Features: Bags are labeled and color coded to corresponding micron rating: Purple - 25 micron, Yellow - 73 micron, Orange - 120 micron, Blue - 220 micron. Includes a 20 x 20 cm pressing screen with 25-micron rating. Designed for use with 1-gallon buckets or tubs. Made of durable waterproof coated nylon material, with built-in flexible cord for securing the filled bag. Set includes 4 pieces of 1-gallon filter bags. Includes a storage bag for organized and clean storage when not in use. Effective for oil extraction from herbs. Specifications: Material: Nylon Quantity: 4 pieces Colors: Purple, Yellow, Orange, Blue Micron Ratings: 25, 73, 120, 220 Pressing Screen Size: 20 x 20 cm (7.87 x 7.87 inches) Item Size: 29 x 15.5 cm (11.42 x 6.10 inches) H x D Package Weight: 328 g (11.60 oz) Package Dimensions: 27 x 23 x 7 cm (10.63 x 9.06 x 2.76 inches) Package Contents: 4 x Filter Bag 1 x Pressing Screen 1 x Manual (English)