Sold as a pair.
Seismic has launched their very own line of pucks and they have given us four excellent choices so you can customize your slide.
The Classic Blue is a great standard size puck 3.25" wide and .5" tall.
The Classic Blue Hollow is the same 3.25" wide x .5" tall puck, but they cut a hole out of the middle to reduce surface area contact on the ground, which means you are loosing less speed when your paws drag.
The Extra Hard Black is their UHMW (Ultra High Molecular Weight) option in a sexy hexagon shape with the middle cut out.
The Extra Hard Black W/flint is in the same hexagon shape, but also include 6 x 1cm wide flint dots embedded in the stealthy looking UHMW material. When your hands hit the ground with these a shower of sparks fly everywhere.
The cool thing with the hexagon shaped pucks are that the shape allows you to choose the pucks orientation. If you have small hands you can arrange the edges so that they point straight up and down giving you a sub 3" wide puck, or if you want the standard 3.25" wide puck you can point the corners out. Both sets are .5" tall.