Twin Plain Linear Bearing Pillow Block - PWN32 2" OpenTwin sized plain linear bearing pillow block, open, with a 2" inner diameter. The mountable housing is made of aluminum alloy. The bearing inside has an anodized aluminum shell and a precision cut interior, lined with self lubricating FrelonGOLD for maintenance free operation, low friction, and durability in extreme conditions like high temperatures, dirt, and vibration. The twin design resembles two blocks positioned end to end Precision ID: 0. 0005"