B   : Modified internal construction
M  : Solid brass cage, ball-guide.
DB : Two deep groove ball bearings in O arrangement, matched clearance-free
DF : Two deep groove ball bearings in X arrangement, matched clearance-free
DT : Two deep groove ball bearings in tandem arrangement, matched clearance-free
2RSR :  Lip seals on both sides
RSR:    Lip seal on one side
BRS :   Labyrinth seal
TVH :  Cage made from glass fibre reinforced polyamide
Y :       Sheet brass cage
2Z :     Gap seals on both sides
Z :       Gap seal on one side

We have 1680.00 sets in stock . If you have reuqirements for the bearings given as above, please feel free to contact us.We can assure you the best quality ;the most competitive prices ; the shortest delivery time and the highest quality service.