Designed for reliable performance in below-ground applications, this polymer concrete extension combines strength with lightweight benefits, making it an ideal choice for handholes and manholes. Certified to ANSI/SCTE77 standards, it offers enhanced durability and longevity, staying resistant to both fire and chemicals. Available in multiple styles and sizes, it provides a cost-effective solution for various installation needs while ensuring reliability with its Tier 22 load rating. With dimensions of 24 x 36 x 8 inches, this straight wall extension is built to meet the demands of modern infrastructure projects efficiently.