PRODUCT: Genuine Bearing Buddy(s) with Protective Bra(s) These genuine products have proven themselves as the leading bearing protectors for the past 35 years and counting. Genuine Bearing Buddy protectors provide protection against damage from water and dirt entering the wheel bearings and make lubricating a snap. These are the ultimate hub and bearing protection.QUANTITY (1): Includes two (2) Genuine Bearing Buddies and two (2) Protective BrasMODEL / Part #: Bearing Buddy: 1980A-SS / 42204 Bra: 19BSIZE: 1.980 inch Diameter (designed to be used in most 4 or 5 bolt hubs)FEATURES:Stainless Steel construction and components (your best defense against corrosion)Auto Check Feature indicates grease level (blue rubber insert)Prevents wheel bearing failure on most tailers with 1.980 inch hub diameterExtends bearing lifeKeeps water and dirt out of hubs and bearingsProven in use for over 35 years and billions of miles of serviceEasy to installOnce these are installed and filled with the required amount of grease, these Genuine Bearing Buddies apply a small amount of internal pressure in the hub (about 3 psi). When the hub is submerged water cannot enter the hub because of the pressure.SHIPPING: Other sellers only offer standard shipping which may take up to 10 business days for you to receive your products. WE ONLY SHIP using EXPEDITED USPS PRIORTIY MAIL to ship your product. You will received your products within (4) business days from the day you make your purchase. HOW GENUINE BEARING BUDDY WORKSPer the bearing Buddy diagram, the axle hub is filled with grease until the grease forces the Bearing Buddy piston outward about 1/8 inch. Because the piston is spring loaded, the piston exerts a slight (3 psi) pressure against the grease, which maintains a slight pressure between the inside of the hub and the outside environment. When the hub is submerged, water cannot enter the hub because of this pressure. An automatic pressure relief feature prevents over-filling and over pressurization. Without this feature, the inner seal will be damaged. Grease can be added to the hub through an easily accessible grease fitting located in the center of the piston. Lubricant level (and pressure) can be checked quickly by pressing on the edge of the movable piston. If you can rock or move the piston, the hub is properly filled. The Genuine Bearing Buddy will last the life of your trailer. The outer barrel is made of stainless steel. Internal Genuine Bearing Buddy parts are also made of stainless steel for maximum corrosion protection. You will spend less time maintaining your trailer and more time boating.HOW TO INSTALL A BEARING BUDDY AND PERFORM A SEAL INSPECTION Remove hubs and check the bearings before installing your new Genuine Bearing Buddy(s). Replace bearings if they are damaged, rusted, or pitted. Clean old grease and contaminants out of the hubs. Check the condition of the inner seals. Be sure they are new, top quality, and running on a smooth spindle sealing surface. IMPORTANT: As you reassemble the components, fill the hubs completely with a high quality, multipurpose, no.2 grade lubricant (e.g., the type used for automotive suspensions). Don't use heavy, fibrous greases; don't mix grease types. GENUINE BEARING BUDDY INSTALLATIONHold the Bearing Buddy against the hub with a small block of wood, and drive it into place with a hammer. If the Bearing Buddy cannot be driven into the hub, or will not fit tightly into the hub, don't force it. Your hubs may be slightly over-sized or undersized. If this occurs, or if your new Bearing Buddy is obviously too large or too small; first attempt to contact your trailer manufacturer to ensure your hub size then contact us. HOW TO REMOVE A BEARING BUDDYGenuine Bearing Buddy(ies) are held in the hub by an interference fit. To remove a Bearing Buddy, lay a block of wood against the side of it and strike the wood with a hammer. Place the wood on the opposite side and hit again. Continue thisprocedure until you “walk” the Bearing Buddy out of the hub. Don’t disassemble the Bearing Buddy to attempt to remove it.