Bulk refill box of 144 flat, white soapstones intended for use with SS3H Keson Soapstone Marking Holder. Soapstones are great for marking paver stones and other porous surfaces. Soapstone markings wash away easily and leave no sign of a marking line on your finished surface! Each piece of soapstone measures approximately 4-7/8 long, 1/2" wide, and 3/16" thick. Ship wt. 7lb