3M Hookit Paper Sheet, 236U, P240, 3 2/3 in x 9 in (93.1 mm x 228.6 mm) The 3M Hookit Paper Sheet 236U is a premium aluminum oxide sheet with a durable edge and convenient 3M Hookit AttachmentA go-to product in many industrial operations, this durable sheet is well suited for high-production sanding operations as well as general purpose applications on paint, primer, wood, metal, plastic, and composites, including fibreglass. Product Information Brand 3M Part # 7100083287 Origin Country Canada Product Information3M Hookit Sheets are easy to change and reuse, maximizing sanding utility for the life of the sheetOpen coat construction and load-resistant coating help prevent premature loading to maximize cut and extend abrasive lifePremium aluminum oxide mineral is durable, cuts fast, and performs well on many surfacesStrong, C-weight paper backing supports aggressive sanding with extra durability compared to lighter weight paper backings