Feel Calm while driving Your trailer with this boat hub. This 5 lug hub kit in 4.5 Space offer Excellent Galvanized Surface Treatment to prevent rust, protect your trailer wheels from harsh conditions. A bearing Kit added to give you greater peace of mind. Fits 1 -1/16 to 1-3/8 Trailer Axles 3500 Lbs. Material: SAE G3500. Tensile 150,000 PSI min, Proof 120,000 PSI min. Bearing: L68149 Inner , L44649 Outler. If you buy this kit , you save money because this kit have one aditional bearing kit whose price in the market is approximately 15 to $25 dollar, result the trailer hub cost is $35 to $45 , is very good price for Galvanized trailer hub Assy. Excellent boat trailer axle kit. The good maintenance the boat trailer axle assembly is very important for long time use. 5 lug trailer hub assembly wrapped in plastic to prevent damage with nuts and bearing dust cover. The bonus trailer wheel bearing added is package separately zip lock. Trailer hub Quality marine grease is very important for the bearing lubricate, if possible use a bearing packer for uniform grease distribution thats support bearing hub long utility life.