A-z + 0-9 alphabet + numbers letterpress printing blocks height: 1.77 inch (45 mm) #708. As the characters have had a working life and were used for many, many years, there are signs of wear, scratches, etc. The material of the charac. Ters is synthetic resin, they can be used like wooden printing blocks. Please check also our other offers, we have some more type sets, also complete sets, for sale.