5pk 500 Sheets/pack 20lb Half Sheet Perforated Paper 8.5"x11" White - Printworks : Target
Lettermark™ Custom Cut Sheets, Letter Size, Perforated At 5 1/2", 20 Lb, 500 Sheets Per Ream, Pack Of 5 Reams - Zerbee
Amazon.com : 8-1/2 x 11 Blank Perforated Paper, 24# Paper Perforated in 4 pcs, 4 Per UP Page Perforated Paper - 500 Sheets/Ream, Item #1689 : Office Products