Neenah Index Cardstock, 8.5" x 11", 90 lb/163 gsm, White, Lightweight, 94 Brightness, 300 Sheets (91437)Brand: Neenah Color: white Features: BRIGHT WHITE CARDSTOCK: The smooth texture and crisp bright white color of our 90 lb cardstock produces high resolution images and prints for attention getting and professional documents LIGHTWEIGHT CARDSTOCK: This is 90 lb. INDEX cardstock, which is measured differently than COVER cardstock. For a weight comparison, its heavier than 67 lb. Bristol cardstock, yet lighter than 65 lb. COVER cardstock LETTER SIZE