Hi…..friends here i will show how create a stock vector illustration 3d box images.
In this tutorial you will learn how to create a box quick and easy.
[1]-Create two boxes with the following size
Place like me 
[2]-Create more cylinder with the following size and place like me 
[3]-Convert the box into the editable and make the selection like me 
[4]-After that apply the extrude polygons with the amount of 0.1 
[5]-Your object should like this 
[6]-Create rectagle with the following size and apply the exturde polygons with the amount of 11.5 
[7]-Place the object like me 
[8]-Go to the boolean and boolean the object like me 
[9]-Create chamfer cyl with the following size and place like me 
[10]-Make the materials like me 
[11]-Now you are done it enjoy the final output as shown below
