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: 5 Pcs 30mm Crystal Glass Cupboard Wardrobe Cabinet Door Drawer Kitchen Knobs Handle
Product description: Specificatons: Material: Crystal glass and aluminium alloy Crystal diameter: Approx. 30mm Base diameter: 18mm Total height: Approx. 30mm Screw Length: Approx. 28mm Applications: Suitable for installing in cupboard, cabinet, door, drawer, bar, restaurant, hotel and so on. High-end gift for thoes who are decorating their homes Package includes: 5 x Crystal glass handle 5 x Screw
Product feature: Material: Crystal glass and aluminium alloy, Crystal diameter: Approx. 30mm, Base diameter: 18mm, Total height: Approx. 30mm, Screw Length: Approx. 28mm
Product brand: Exciting
Target attributes: Finish
Answer: attribute: finish
value: None
source: None