Image Item No. Description  52398 (Inv)  Ruler, Buildable Ruler - Black Plates with Blue Baseplates Catalog: Gear: School Supplies  52399 (Inv)  Ruler, Buildable Ruler - Blue Plates with Blue Baseplates Catalog: Gear: School Supplies  52396 (Inv)  Ruler, Buildable Ruler - Green Plates with Blue Baseplates Catalog: Gear: School Supplies  52397 (Inv)  Ruler, Buildable Ruler - Medium Lavender Plates with Blue Baseplates Catalog: Gear: School Supplies  51498 (Inv)  Ruler, Buildable Ruler - Multicolor Plates with Blue Baseplates Catalog: Gear: School Supplies  5005107 (Inv)  Ruler, Buildable Ruler - Multicolor Plates with Green Baseplates Catalog: Gear: School Supplies  52395 (Inv)  Ruler, Buildable Ruler - Red Plates with Blue Baseplates Catalog: Gear: School Supplies  52394 (Inv)  Ruler, Buildable Ruler - Yellow Plates with Blue Baseplates Catalog: Gear: School Supplies