Roaring Spring® Whitelines Engineering Pad, 5 sq/in Quadrille Rule, 80 Gray 8.5 x 11 Sheets, 24/Carton, Ships in 4-6 Business Days (ROA17030CS) Case of 24Roaring Spring Whitelines Engineering Pad Merge 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. Global Product Type: Drawing & Design Pads Pad Binding Type: Glued Pad Binding Edge: Top Sheets