https://www.sanyabearing.com/product/pillow-block-bearings/stainless-steel-cast-iron-pillow-block-units-ucfl-series.html
Pillow Block Units AISI 440C Material:
Higher resistance to rust and corrosion than 52100 chrome bearing steel, Please note that AISI 440C will have magnetic properties.

Chemical Composition: C:0.95-1.20, Si≤1.00,Mn≤1.00, P≤0.04, S≤0.03, Cr:16.0-18.0,Mo:≤0.75

AISI 304 Material:

AISI 304 stainless steel, widely used as corrosion- and heat-resistant steel and also as nonmagnetic steel, is most suitable in corrosive environments where
AISI 440C stainless steel can not be used.

Chemical Composition: C≤0.08, Si≤0.75,Mn≤2.00, P:0.045, S:0.03, Cr:18.0-20.0,Mo:8.0-10.5,Ni≤0.10

AISI 316L Material:

316L stainless which provides superior corrosion resistance when compared to conventional steel and 440 stainless bearings.

316L Stainless is the standard molybdenum-bearing stainless steel. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304,
particularly higher resistance to pitting and crevice corrosion in chloride environments.

Chemical Composition: C≤0.03, Si≤1.00,Mn≤2.00, P≤0.045, S≤0.03, Cr:16.0-18.0,Mo:2.0-3.0, Ni:10.0-14.0

Packing

Tube packing, single box packing or other industrial packing are all available.Special requirements should be mentioned in the order

Our own NSJ package is as below