Hidden Entrance to Secret Box 4

The Hidden Entrance to Secret Box 4 is waiting for you to solve. The secret is an old one and it's a bit of a challenge but you are up to it, patience is required.
 
Please let us know if you need some additional modifications to this design, change may impact the cost of the product, we will try to accommodate with no price change but we have to understand the change to analyze the price impact. 
 
Customer Service is most important to us. Feel free to contact us with questions, comments, complaints or compliments on our products and service. We will respond as soon as we can hopefully within the same hour.