AboutExtensa ManufacturersExtensa is a 100% Dutch company with manufacturing facilities in Cambodia, China, Poland and Vietnam. Extensa is a company that manufactures drainage products such as manhole covers, drain covers and drain grates. Extensa offers a wide standard product line of manhole covers and drain grates in various classes and specialized custom design services to meet clients requirements. |
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Headoffice & Facilities
Our showroom and head office is located in the Netherlands and we have partnering facilities in Cambodia, China, Poland and Vietnam.
Manhole Covers
Extensa manufactures and supplies a large range of round and square manhole covers. Custom products are available upon request.
Drain Grates
We offer the following drain grates: trench drain grates, catch basin grates and tree grates. Custom decorative drain grates are available upon request.
Contact address
Extensa Manufacturing
Showroom & Head office Mellinkstraat 4
The Netherlands +31 (0) 24 8200 271
contact@manholecovers.org