for standard 58505 bearings also the sealing arrangement is different with a seal in ... 58597 ends for 85mm wide bearings w/seal pr .175.00 spherical evolution 4 ... 58599 ends for 85mm wide bearing w/o seal pr .175.00 housing ends for 85mm narrow ... 1.50 long no provision for inner seal 4130 heat treated forging for 58509 ... bearing and 58570 bolt kit bolt kits seals mw stocks both 3/8 and 1/2 backing ... nuts mw offers 3 different inner axle seals for all mw 2 housing ends these seals ... 58514 58515 58516 58570 housing end seal for 1.625 dia axle .6.50 housing ... end seal for 1.774 dia axle .6.50 housing ... end seal for 1.562 dia axle .7.10 backing ...