ShopIBT | Plummer Block Housing Unit, Series: PSHEY-XL, 20 mm ID, 33.3 mm Base to Bore Centerline, 65 mm Overall Length, 64 mm Overall Height, Compatible Bearing Type: Radial Insert Ball Bearing,
304 Stainless Steel Recessed Flange Mount Ball Transfer 15.8mm Roller Diameter (BTR216SS) - Richmond Wheel & Castor Co
Ashland Conveyor - Ball Transfers; Base Shape: Square ; Working Orientation: Ball up ; Mount Type: Flange ; Load Capacity (Lb.): 75 ; Mount Height: 1.8125in ; Overall Diameter: 1.688 - 13950068 - MSC Industrial Supply
Jergens Ball Lock System Compatible, Bolt-In Recessed Modular Fixturing Receiver Bushing 16mm ID x 1-7/16" OD, 15/32" Overall Height - Walmart.com
Pololu Ball Caster with 1″ Plastic Ball and Plastic Rollers