office chair, kerdom ergonomic desk chair, comfy breathable mesh task chair with headrest high back, home computer chair 3d adjustable armrests, executive swivel chair with roller blade wheels (black) kerdom our brand: kerdom, an expert in office chairs, we seek to be more professional, more comfortable and more considerate. this modern office chair adopts an ergonomic design, with an adjustable headrest to support your cervical spine; a high and elastic breathable backrest and cushion, giving your spine sufficient support and comfortable enjoyment; multi-level adjustment removable handrails meet the needs of different types of people.the reclining lock function can make you more relaxed when resting. we deliberately replaced the wheels with more advanced transparent wheels made of industrial-grade steel, precision ball bearings and polyurethane. they can remain smooth on any material ground and carpet, without causing any scratches and damage, and are very quiet, no unpleasant noise. the cleaning of the wheels is also very convenient, and it is not easy to cause the problems of wheel jam or inflexibility. the assembled size of the chair is: 26'l*23.6'w*47.2'h, and the size of the seat cushion exceeds 25 inches, which can give you a comfortable space for your hips and legs. the lifting function allows it to rise to a maximum of 49.2 inches. meet the needs of people with different height tables and different heights. the maximum weight of the chair is: 275 lb, which can bear the weight of most people. its sturdy material allows you to enjoy the comfort and reliability of stability during use.