ProtoArc EC200 Ergonomic Mesh Office Chair, Pure Black

What this listing is, and who it is sized for

This is the ProtoArc EC200 high-back mesh office chair in Pure Black, model EC200. ProtoArc's product page offers it in Gray and Black. The manual names the manufacturer as Hebei Youjin Furniture Co., Ltd., and gives ProtoArc support hours for help.

The size range is the first thing to check. ProtoArc says the EC200 is built for users from 5 feet 4 inches to 6 feet tall, with a recommended weight range of 90 to 220 pounds, and the listing gives the same height range and a 220 lb maximum. If you are outside either range, the maker's own sizing does not cover you, so weigh that before buying.

The sliding seat works differently

ProtoArc and the listing describe a seat-depth adjustment with five lockable positions and 1.97 inches of travel. The manual explains how it moves: pull the seat lever straight up and hold it, then lean back and push forward gently with your hips to move the seat forward, or relax to let it slide back. Test this movement soon after assembly.

The manual's diagram marks the travel as 7 centimetres, or 2.76 inches, which is more than the 1.97 inches ProtoArc and the listing state. We could not resolve the difference from the documents, so treat 1.97 inches as the figure ProtoArc publishes and check the travel on arrival if seat depth is the reason you are buying.

Lumbar, recline and headrest

The lumbar panel slides up or down when you hold its upper edge; ProtoArc gives 2.36 inches of height travel. A knob sets how firmly it pushes, with 0.8 inches of depth: counter-clockwise for more support, clockwise for less. The arms are 2D, and ProtoArc lists them as height-adjustable.

Recline unlocks when you pull the lever on the right side of the seat outward. Lean back to the angle you want and push the lever back until it clicks to lock at 90, 105, 120 or 130 degrees; a tension knob sets how hard it is to lean back. To release a locked angle, lean back slightly and pull the lever out again.

The headrest moves forward and locks as you push it. To move it back, the manual says push it fully forward to release the lock, pull it all the way back, then set it forward again. It also pivots and rotates. Seat height uses a lever under the seat: sit to lower it, stand to raise it.

Dimensions do not agree across sources

ProtoArc's page gives 20 inches deep, 20 inches wide and 46.75 inches high, a total height range of 42.52 to 45.67 inches, a 20-inch seat depth and a net weight of 16.5 kilograms. The listing gives 20 by 21.26 by 44.5 inches and a weight of 45 pounds, with an arm height of 10.6 inches.

The maker's own 46.75-inch figure sits above its stated height range, and the listing's width is wider than ProtoArc's. Measure your desk clearance against the larger figures to be safe. Neither the manual nor ProtoArc's page gives floor-type guidance for the 2.36-inch casters; the listing's surface field says Hard Floor.

Assembly

The base arrives as five separate crossbars and a centre hub, with five wheels, a gas cylinder, the seat, backrest, adjustment mechanism, two armrests and a headrest, plus screws in five sizes and an Allen wrench. ProtoArc estimates about 20 minutes and says no extra tools are needed.

The headrest clips onto the backrest and is fixed with screws, following the steps and diagrams in the manual. ProtoArc also points buyers to an installation and adjustment video on its site, which we did not watch.

Warranty: five years, but check the seller

The manual gives a standard five-year warranty from the date of delivery, covering material and manufacturing defects, the mechanisms and adjustment functions, and structural stability. ProtoArc's product page also says five years. The Amazon listing's warranty field says three years, which conflicts with both.

The manual limits the policy to products sold and shipped directly by ProtoArc, including its own store on Amazon, and bought new in original packaging. It excludes accidents, misuse, normal wear and fading, unauthorised repairs or modifications, and use beyond design limits. Check that the offer you pick is sold by ProtoArc before relying on the five-year term.