Number stamps up to 20. This set contains number stamps with 1 and 2 digits, which makes it easy to stamp numbers 10 - 20 in 1 stamp. Contents: 24 rubber stamps with see-through grip: - numbers 0-20 - math signs +, - and = - height of stamp print 1.8 cm wooden box (26 x 16 x 5.2 cm) This item will be sent from Nienhuis, please see our Delivery Page for details. Any additional postage charge will be calculated in the checkout as Nienhuis Delivery (NL). This is an educational product and is only to be used under the supervision of professional trained adults in a school environment.