Kleer-Fax Tare-Shield Mylar Reinforced Filler Paper, 5/16 Inch Ruled - Red Margin, 50# White Offset, 11 x 8-1/2 Inches, 100 Sheets per Pack (20915) Mylar reinforced Tare-Shield binding edge with rounded edges 50# white offset, 30% post consumer waste 3 hole punched filler paper, ruled 100 sheets per pack Made in the USA