ETA hand2mind Rekenreks Class Set, (Pack of 30) Class Set includes 30 individual student rekenreks Also includes 1 teacher demonstration rekenrek Teacher demonstration model includes a write-on/wipe-off panel Rekenreks feature 20 beads on 2 rows- each row has 5 red and 5 white beads Rekenreks are made of solid wood construction with 2 metal sliding rods