Manufactured by M CON Products Inc.
Precast Concrete Box Maintenance Holes with 1200 mm dia. Chimney, Sizes as Follows: (mm)
914 x 914, 1219 x 1219, 1524 x 1829, 1829 x 1829, 1676 x 2438, 1829 x 2438, 1676 x 3048, 2438 x 2438, 2438 x 3048, 2438 x 3810 and 3810 x 3810.
Non Standard Special Design Box Maintenance Hole Sizes as Specified.
5 Sided Special Design Maintenance Holes Available upon Request.
https://mconproducts.com/precast-products
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