Cheap And Discounts 2Pcs PP Plastic Bearings Type 603 604 607 6273 624 625 627 629 683 684 Acid and Alkali Resistant Self-Lubricating Polypropylene Wholesale. Buy Directly From Merchant HengKun Hardware Store Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.