Twin Sized Open Plain Linear Bearing Pillow Blocks featuring self-lubricating Simplicity® Plain Linear Bearings in a self-aligning aluminum shell, designed for harsh, dirty, high-vibration, or high-temperature environments with the standard FrelonGOLD® bearing liner. Optional liners include Frelon®J for corrosive chemical environments and Frelon®W for FDA compliance. Equivalent to two single-sized pillow blocks mounted back-to-back, these pillow block bearings are offered in inch ID sizes from 0.25 in (6.35 mm) to 2 in (50.8 mm). Customers can select standard ID running clearance (0.0005" per side) or compensated ID running clearance (0.0015" per side).