Description:HIGH QUALITY: Made of high quality ABS material, durable

FEATURE: Efficient and fast give practice questions, no smudge, no fading

USAGE: Add ink, which can be used repeatedly

DESIGN: Small, exquisite, easy to carry

EDUCATIONAL: Interesting teaching, let children like learning more

Specification:Material: ABSOptional Type: Addition, Subtraction, Multiplication, DivisionSize Chart: 4

4cmx3cmx4

8cm / 1

73inchx1

18inchx1

89inchPackage Includes:1x Roller Stamp1x Ink1x Storage CaseNote:Please allow slightly errors due to manual measurement and different monitors