YX-04 (back frame + 616 armrest)

When a European seating brand sends a chair base RFQ to ten factories across three countries, the returned quotations list three different plastic grades, load ratings from 80 kg to 250 kg, and prices that spread by mo...

One bad gas lift cylinder can turn a profitable chair shipment into a warranty disaster. Buyers who skip third-party verification routinely find that a "quality" cylinder starts leaking, loses height, or fails load tes...

Two numbers decide whether a 30,000-unit chair program ships on schedule: the glass-fill shrinkage allowance on a molded back frame, and the datum scheme on a 350 mm five-star base. Leave either one out of your chair c...

A five-star office chair base can pass a supplier's in-house drop test and still fail within 18 months of daily use. The gap is test definition, not material quality: factory checks load a base in one direction, while ...