This velcro foam block is perfect for your 6" or 150mm velcro discs 

You can move the disc around to use the whole disk.

Has great edges and corners for sanding close to you fins and glass bridges without your sand paper slipping.

Your order comes with 1 - 80 grit disk.

If you wanted more just let them know in your order - they are $1.00 each

These are good to be added to your kit or your blank.