Firestone 6397 267C1.5 Ride-Rite Double Convoluted Standard Air Spring Compressed height is 2.80 inch Ride height is 5.50 inch - 6.50 inch Maximum diameter is 6.60 inch Air inlet hole sizes is 1/8 NPT = 0.33 inch , 5/8 inch -18 combo stud; alignment pin, 3/8 inch -16 blindnut