Dura-Block 6 pc Sanding Blocks Set AF44A & 3M 01679 Red Abrasive P80D 25 sheets Dura-Block Set Includes these assorted blocks: (1) - Standard Block This block is designed to follow contours and flats No dents, no ripples 3/4inchH x 1-3/8inchW x 11inchL (1) - 1/3 Block This block is designed to follow slightly curved or flat panels without digging into fill material 1-1/2inchH x 2-5/8inchW x 5-1/2inchL (1) - 2/3 Block This block is designed to allow the user to accurately block flat panels and panels with slight curves 1-3/8inchH x 2-5/8inchW x 11inchL (1) - Round Block This is the inchRoundinch style block Use to sand and block highly curved surfaces Uses 9inch x 11inch PSA sheets 1inchL, Thickness: 1-1/4inch (2) - Scruff Blocks This block is designed for sanding and prep work It allows for easy use and much improved durability and firmness 1/2inchH x 2-1/2inchW x 5-3/8inchL 3M Red Abrasive PSA Adhesive Sheets Aluminum Oxide Mineral PSA Attachment Fast cutting and long lasting Grit - P80D Sheet Size - 2-3/4inch x 16-1/2inch 25 Sheets per box