Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Tsukineko Dual-Ended Fabrico Marker Color-Fast, Cool Gray
Product description: A staple of fabric crafters, Tsukineko's dual-ended Fabrico Markers have a brush point for coloring and a bullet point for small details, writing and other fine work. Ideal for natural fabrics and all other natural porous surfaces, Fabrico Markers are also great for memory crafting (archival and acid-free), working with paper mache and more. Fabrico Markers maintain the natural soft hand of your fabric and do not require heat-setting to be permanent. These water-based pigment markers feature brightly colored end caps the same color as the ink make color identification easy and quick Use them to compliment VersaCraft Fabric Inkpads and All Purpose Inks; they are also perfect for adding shading or highlighting to any fabric project: quilts, wall hangings, tea towels, canvas bags, etc. They're also wonderful for personalizing garments (t-shirts, jeans, etc). What better way to show school pride? Best results achieved on natural fibers. Tsukineko's Fabrico Markers are offered in beautiful colors. Store horizontally.
Product feature: These markers work on fabric, wood, leather, unglazed ceramic, paper Mache, and shrink plastic., They are acid free, fade resistant and archival quality., Store horizontally to keep both tips well-inked., Tsukineko's dual-ended fabrico markers feature a brush tip for coloring and a bullet tip for small details, writing and other fine work; ideal for natural fabrics and all other natural porous surfaces, fabrico markers are also great for memory crafting, Fabrico Markers maintain the natural soft hand of your fabric and do not require heat-setting to be permanent, Fabrico Markers are a perfect compliment to VersaCraft inkpads and all purpose inks; Use them for shading and highlighting - or adding bits of details; Great for quilts, wall hangings, tea towels, canvas bags and garments, Brightly colored end caps the same color as the ink makes color identification easy and quick, Measures 3/4-inch by 7-inch
Product price: $8.57
Product brand: Tsukineko
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None