Set of four, New engine isolators. Fabricated with custom made 16mm stud, as new isolators come without the studs. Max. Load 50 Kg Each Suggested by manufacturer. Custom M16 x 1.5 Metric studs, 80mm long (from top of the isolator) 2 of 11mm mounting holes both elongated for adjustment. 100mm center to center. Sketch in the photos, has slots shown wrong way, as in reality they are side to side for engine alignment. Pictures are correct.