Phone: (+91 33) 2282 7707 / 2282 1339 Fax: (+91 33) 2282 1886 / 2282 3952 E-mail: crescentfoundry@vsnl.com Gray & Ductile Iron Castings Manhole Cover and Frame (for North America) Manhole Covers and Frames (for Europe) Manhole Covers and Frames (for Middle East) Gas and Air Tight Inspection Cover Manhole Riser Rings Catch Basin Grates, Gully Gratings Tree Grate (Tree Grille) Trench Grates, Channel Gratings Bollards Water Meter Box, Valve Box and Surface Boxes Fabricated Mild Steel Products Galvanized Inlet Grates, Gully Gratings Manhole Riser Rings Galvanized Manhole Steps Plastic Products Drainage Pits Channels Water Meter Box Reinforced Concrete Accessories Unipit and Grates Other Products	Manhole Riser Rings (click thumbnails for larger image) We manufacture gray cast iron and ductile iron manhole riser rings / extension rings / repaving rings / paving riser rings as well as fabricated mild steel riser rings. Manhole Riser Rings - Overview Available in Gray Iron, Ductile Iron and Fabricated Mild Steel All castings are available in ASTM A48 Class 35B Available in Repaving heights ranging from less than 1" to 6" for different sizes of Manhole openings Fabricated Mild Steel Riser Rings are designed for smaller rises to suit micro paving of roads Fabricated Mild Steel Riser Rings are specially designed to allow for small variances in Manhole Rings Also available for Valve Boxes
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