Specifications: Units: This listing is for a pair (left and right) of suspension units. Fitted with standard 1" trailer stub axles. Also available with hubs in our shop. Very heavy duty construction make this suitable for daily use by business. Far tougher and long lasting than most 350kg suspension units. Maximum weight (per pair) 350kg Features a solid suspension arm for strength and less prone to rusting than cheap hollow box section suspension arms. Complete with washers and castle nuts for mounting the hubs. Other parts such as wheels, bearings, mounting plates etc. are available in our shop. Mounting holes sizes are as pictured. Hubs Specifications: Taper Roller bearing hub This listing is for a pair of hubs which is often fitted to camping trailers, jet ski trailers 4 stud with 4" PCD (PCD = Pitch Centre diameter - distance diagonally from one stud to another) Fits a standard 1" trailer stub axle Complete fitted with 3/8" wheel studs The bearing races are already pressed into the hub meaning no specialist tools are required to fit the hubs. The hub is also fitted with a grease nipple. SET INCLUDES THE FOLLOWING 2 X Cast Hub (unplated) 2 x outer bearing (complete with seal) 2 x inner bearing 2 x hub cap 8 x wheel nuts