I just bought 4 Brand New Boat Trailer Leaf Springs from ETrailer over 60 days ago and realized I needed a different style spring and I can't return them . They are " 27" Double-Eye 3,500 pound 4 leaf springs " . ETrailer part # e97SR . They measure 27" inches from the center of each bolt hole to bolt hole . ( Straight across- NOT along the curve) . They have 4 leafs total . They are 1.75 " wide . The holes are for 9/16" bolts . They are rated for 3,500 pounds per pair ( the common rate for 5 lug trailer trailer axles per axle ). ( I didn't look carefully enough and my trailer has the open reverse "c" slipper end on one end of the leaf spring ). They got some very very light surface rust on them and I just sprayed them with WD- 40 and put them in my storage shed and they were never installed . They were $61 clams each new . $244 total new - I'll sell them for $200 or possibly trade for tools ,boat ,car ,truck , muscle car parts or stuff or ? .If interested give me a call at the number in the above contact box that you have to click on. Thanks .