1-3/4" Trailer axle with 6-hole 15" wheels & tires. 4" drop axle, 67-1/2" between drops.  Axle is set up for Hadco hydraulic brakes but condition of internal components unknown.  Tires: Gladiator ST225/75R15, 10 ply rating, trailer service.  See my other listings for 2 more axles, springs and frame ouriggers.