Serving as drop-in replacements for all inch-sized linear ball bearings, LM76 FDA- and USDA-compliant bearings measure from 1/4 to 1 1/2 in. in size; they are available in closed and open configurations. Self-lubricating Teflon composite bearings come in a 304 stainless steel shell. 

LM76; www.lm76.com