Double Roller Pillow Block Bearing DPB-08-OPN-S 1/2" ID - 2 Scrapers

2 Pairs of Roller Bearings in a standard sized Pillow Block for a 1/2" shaft (shaft not included) 

2 Scrapers built-in to remove particles and dirt from the shaft during movement

Standard Width with 2 roller bearings on each side, hence the term "double." Some PBC Linear products use the term "double" to mean "double wide" but this product has a Standard Width. Choose the Twin roller bearing pillow blocks if you are looking for double length.