OK-509 PP Plastic Chair Seat and Back Replacement Shell Set for School Classroom Training Chair Manufacturing

The OK-509PP is a molded PP plastic seat and back replacement set developed for school furniture manufacturing and chair refurbishment. The separate components allow worn or damaged plastic seating surfaces to be replaced while retaining a compatible existing chair frame.

The backrest features multiple triangular perforations that promote airflow and create a distinctive education-focused appearance. Its contoured back and shaped seat are suitable for classroom, training and institutional seating applications.

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Model:
OK-509PP
Brand:
OK-BUY Chair

The backrest is injection molded from PP plastic and measures approximately 44 cm wide by 33 cm high. Distributed triangular openings improve ventilation, while the curved lower edge and contoured surface provide a practical shape for school and training chair applications.

Multiple triangular openings allow air to pass through the back panel during classroom and training use, distinguishing this replacement shell from fully closed plastic backrests.

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Product Description

Product FAQ

About Us

The backrest is injection molded from PP plastic and measures approximately 44 cm wide by 33 cm high. Distributed triangular openings improve ventilation, while the curved lower edge and contoured surface provide a practical shape for school and training chair applications.

Multiple triangular openings allow air to pass through the back panel during classroom and training use, distinguishing this replacement shell from fully closed plastic backrests.

What is the model number of this product?
The model number is OK-509PP.
Is this product a complete chair?
No. It is a PP plastic seat and backrest replacement set. The metal chair frame is not included.
What material are the components made from?
Both the seat panel and backrest are made from injection-molded polypropylene plastic.
What is special about the backrest design?
The backrest contains multiple triangular perforations that improve airflow during classroom and training use.
What are the backrest dimensions?
The backrest measures approximately 44 cm wide and 33 cm high.
What are the seat dimensions?
The seat panel measures approximately 44.5 cm wide and 42 cm deep.
What applications is this replacement set suitable for?
It is intended for compatible school chairs, classroom chairs and training chairs used in manufacturing, maintenance and refurbishment projects.
Does this replacement set fit every chair frame?
Compatibility is not universal. Buyers should compare the component dimensions, shape and mounting positions with their existing chair frame before ordering.
What colors are available?
The standard color shown is black, and custom colors are also available.
What are the minimum order quantity and production time?
The listed minimum order quantity is 300 sets, with an estimated production time of five weeks after payment.

Our Company

With over 25 years of manufacturing experience, we specialize in seating for education, training, conferences, auditoriums, events and public spaces. Our factory is located in Hebei Province, close to Beijing and Tianjin Port, supporting efficient logistics and stable supply to customers in more than 70 countries.

Our Customers

We serve school suppliers, project contractors, furniture distributors, event rental companies, hospitality buyers and government procurement projects. Stable quality, responsive service, competitive pricing and reliable delivery have helped us build long-term partnerships with global customers.

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OK-BUY main product range includes school and classroom chairs, training chairs, conference and event seating, auditorium chairs, and commercial public-space seating. Many models feature durable, lightweight and stackable structures for schools, training centers, hotels, meeting venues, rental businesses and public projeOurcts.