The OFFICE chair base provides chair stability and movement. Many office chairs have a 5 point chair base. Therefore typically the larger the diameter, the more stability the base provides. Bases can be made of different materials:
Polypropylene: Will work for average, light to medium use. If a lot of wear and tear is expect or users have a bigger build, a metal base may be a better option.
Aluminum: Lightweight but strong. Aluminum finish looks nice in professional office settings.
Uprise Aluminum Office Chair Base Straight Pattern Chair Aluminum Base
Steel: Strongest and most durable base option. Good for heavy use.
Spider metal base Designer Metal Base umbrella base for chair Tycoon base for chair Stainless Steel base for chair optima base for chair Libra base for chair Libra2 base for chair HEAVY QUALITY CHAIR BASE FAN BASE for Chair Spider chair Base Bombay base for chair Designer SS base for chair C type Powder coated base for chair Libra Powder coated base for chair Powder coated base for wooden chair Smart Powder coated base for chair