Even as the city's manufacturing sector has shrunk and been squeezed by the costs of doing business here, there's still plenty being made in the five boroughs.

On Friday, eight factories are opening their doors to tours as part of Open House New York Weekend, where companies invite visitors into their workplaces. The businesses are all members of Made in NYC, a network of some 1,250 companies organized by the Pratt Center for Community Development.

The network helps to support the "manufacturing ecosystem," says Josh Eichen, the manufacturing retention coordinator at Pratt. "These businesses feed into the city's economy in big ways," he said.

And while manufacturers can't compete with cheaper goods from overseas, "they are competing on quality and innovation," Eichen said.

Here are five factories being featured in the tour that make everything from industrial-strength bikes to vinyl records. And while the tours are sold out, Made in NYC will be tweeting images and videos from the visits @madeinnyc.

Kirschner Brush Manufacturing Co.

Kirschner Brush Manufacturing Co. has been making its
Kirschner Brush Manufacturing Co. has been making its high-quality brushes for government agencies, businesses and painters in New York City for more than 50 years. Its current factory is located in the South Bronx, where the company makes an effort to hire locals. (Credit: Nicole Tarpy)

Brooklynphono

Of course there's a company in Brooklyn that
Of course there's a company in Brooklyn that manufacturers vinyl records! Brooklynphono is located in Sunset Park, and can master, print, plate press and collate 7" and 12" records. (Credit: Ben Wallen)

Worksman Cycles

Worksman Cycles has been manufacturing its industrial-strength bikes
Worksman Cycles has been manufacturing its industrial-strength bikes in the city since 1898. It's current factory, in Ozone Park, Queens, boasts a solar roof and energy-efficient lighting. The company mostly serves business clients with sturdy bikes like the Industrial Newsboy. (Credit: Azure McBride)

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M & S Schmalberg

M & S Schmalberg is a family-owned business
M & S Schmalberg is a family-owned business that has manufactured fabric flowers in the Garment District for more than a century. Many of the flower designs are handmade, and some styles date back decades. And it's not just silk flowers — blooms can be made out of pretty much any fabric. (Credit: Azure McBride)

Adriatic Wood Products Inc.

Looking for custom-designed mouldings? Don't leave the five
Looking for custom-designed mouldings? Don't leave the five boroughs and head to Adriatic Wood Products Inc., which manufactures lumber products in its East New York factory. (Credit: Josh Eichen)