Oil seal ?

[Popeye]

I bought a used "homemade" utility trailer for hauling my ATV. As I plan on using the trailer for a 200 mile trip I figured I would disregard what the seller said about the bearings being new and inspect them myself. Well they were new, once. I am planning on replacing the rear seal and both bearings one each side but th eonly number I can find is the number on the bearings. All 4 bearings are Koyo L44643. Is there a way to find out the seal number with the bearing numbers? I can not find any manufacturer name or number on the axle, hub or any other part. I am not sure if this is a standard seal or what.

[EasternMarine]

Are they oil bath hubs or grease? This should be the seal size you would need.

http://shop.easternmarine.com/...D=190

[Popeye]

They are grease and I was noticing the seal does not ride on the shaft but rather compresses against the inner race of the inner bearing