About S-Square

S-Square Tube Products is dedicated to designing, manufacturing and distributing innovative traffic safety products. We are the original designer of the patented NEX® family of sign support systems and NEX® mailbox support systems. Our entire NEX® product line is designed and tested to obtain full certification for the stringent requirements of FHWA NCHRP 350 and the 2001 AASHTO design recommendations. We have been listening to and satisfying the needs of our customers for over 25 years. With industry-leading experience, we always welcome the opportunity to assist our customers with product selection, pricing and installation tips.