... . Iron back .2. Size:4" (100*16mm). 3. Number of page :45page.4. Matrix Angle:T27 (0-15°).Flexible flap disc ... ,flap wheels with shafts and etc ,and all the products use the brand abrasive cloth ,such as: VSM,Norton ,klingspor , SIA ... and price list !... Flexible flap disc 4" iron back 45 page KBLD zirconium