Hi, welcome to our online shopping! We provide 5 types of bearing rollers: 1) 3" single bearing roller 2) 3" double bearing rollers 3) 4" single bearing roller 4) 4" single double rollers 5) 5" double bearing rollers For more information, please feel free to contact our customer service chat during working hours. Working hours: Mon-Sat 9am-5pm, excluding public holiday & Sun Note: 1) As we purchase from various suppliers, the brand of products might be different. 2) Pictures are for reference only. Actual products may vary. Colours and sizes based on actual products.