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: Faber-Castell Grip Teal 0.7Mm Mech Pencil
Product description: This Teal Faber Castell GRIP Mechanical Pencil features a soft grip zone for a secure non-slip grip. The ergonomic triangular barrel provides extreme comfort. This mechanical pencil has an extra long twist out eraser and uses 0.77 leads.
Product feature: Ergonomic triangular shape and ideal weight guarantee fatigue-free writing, Color of the characteristic dots on the non-slip grip zone matches the barrel, Teal color, Break-resistant 0.7 mm lead for optimum writing, Extra long twist out eraser under the cap
Product brand: Faber-Castell
Target attributes: Type
Answer: attribute: type
value: mech
source: product title
attribute: type
value: mm
source: product feature
attribute: type
value: mechanical
source: product description