Specifications include, but are not limited to: The scope of this project involves the purchase of Neenah R-1670 self-sealing, nonrocking manhole frames and lids (or equivalent); Neenah R-1670 self-sealing, non-rocking lids (or equivalent); Neenah R-1647-A low-profile, self-sealing, non-rocking frames and lids (or equivalent); Neenah R-1979-0042 two-inch adjusting rings (or equivalent); Neenah R1915J self-sealing, heavy-duty frames and lids (or equivalent) with three (3) equidistant bolt holes in flanges on 30” diameter bolt circle for ½” anchor bolts; Neenah R-1973-1 riser casing and lid (or equivalent); and Neenah R-1974-A riser casing and lid (or equivalent), as specified in the Rock River Water Reclamation District General Provisions and Technical Specifications for Sanitary Sewer Construction.