Whitelines Engineering Pad, 5 sq/in Quadrille Rule, 80 Gray 8.5 x 11 Sheets, 24/CartonMerge the greater clarity of writing on gray paper with sharing technology and you have Whitelines! The paper has Whitelines technology, which when combined with the free Whitelines mobile phone app, will create an instant electronic file of whatever is on the page, while eliminating all background not on the paper. Note: This is a non returnable item.