R155 Full Ceramic Bearing 5/32" x 5/16" x 1/8" MiniatureR155 Full Ceramic Ball Bearing 5 32" ID Open Style ZrO with PTFE Cage The R155 full ceramic bearing is a compact, non magnetic option for high speed or harsh environments. Made entirely from zirconia with a PTFE cage, this bearing handles chemical exposure, moisture, and high temps without breaking a sweat. It's a solid pick for lab gear, medical tools, or cleanroom setups. Size: 5 32" ID x 5 16" OD x 1 8" Width Zirconia (ZrO) ceramic balls and races