Height adjustable cushioned seat. 5 legs base on castors. ADJUSTABLE SEAT HEIGHT - The vertical adjustment from 19.7" to 25.6" makes it easy to coordinate the stool with various desk sizes and this convenient height adjustable seat by hydraulic lift can satisfy all professionals need. 360-DEGREE SWIVEL -Stable swivel casters provide easy movement and extra stability, wheels roll smoothly on all surface types without causing damage. STURDY BASE - The heavy-duty sturdy base and structured screw allows weight capacity high to 300lbs. VARIOUS NEEDS - This stool is great for Spa, Salon, Massage, Beauty, Hairdressing, Manicure, Tattoo, Photo Studio, Cooking in Kitchen, Counter, Drafting, Computer Desk, Lab, Office, Home.