The Uncle 4D Book
Tiagong a lot of uncles like to use this to jot down 4D numbers.
|| More About The Uncle 4D Book:
The Uncle 4D Book is made of paper with surgical steel hooks (hypoallergenic), measuring 4cm x 3cm and weighing 5g each pair.
*Note: Each purchase comes in a pair consisting of the notebook and a 2B pencil!