Wausau Paper Products - Wausau Paper - Vellum Bristol Cover Stock, 67lb, Canary Yellow, Letter, 250 Sheets/Pack - Sold As 1 Pack - Durable semi-smooth cover for mediumweight to heavyweight applications. - Makes a bright, durable report cover. - Get organized with color coding. Durable semi-smooth cover for mediumweight to heavyweight applications. Makes a bright, durable report cover. Get organized with color coding.