Firestone 6766 268C Ride-Rite Double Convoluted Standard Air Spring Compressed height is 2.80 inch Ride height is 4.50 inch - 5.50 inch Maximum diameter is 6.40 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