Description The 3M Klingspoor PS33BK Velcro sanding disc pack includes 50 discs, each 225 mm in diameter with 220 grit corundum abrasive. The discs feature a synthetic resin bond and semi-open coating on Paper B backing, compatible with standard hook-and-loop sanding machines such as Giraffe for profiling and surface finishing. Designed for use on metals, wood, plastics, composites and mineral substrates, the semi-open coating minimizes clogging during extended sanding. The hook-and-loop attachment allows rapid disc changes for efficient workflow. Key Features - 225 mm diameter - 220 grit corundum abrasive - 50 discs per pack - Synthetic resin bond - Semi-open coating - Paper B backing Specifications Brand: 3M Product Type: Sanding disc Diameter Mm: 225 Grit: 220 Pack Quantity: 50 Bonding: Synthetic resin Coating Type: Semi-open Backing Material: Paper B Compatibility: Hook-and-loop sanders