BK2018P Closed End Needle Bearing 20x26x18BK2018P Sealed Needle Roller Bearing Shell Type 20mm x 26mm x 18mm BK2018P Sealed Needle Roller Bearing, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, Bearing inner diameter is 18mm, Bearing outer diameter is 26mm and Bearing width is 18mm. Item: BK2018P Roller Bearing Type: Needle Roller Bearing Size: 18mm x 26mm x 18mm Bearing Inner Diameter: 18mm Bearing Outer Diameter: 26mm Bearing Width: 18mm