Chrome 4130 chromoly with 3mm wall thickness Bar comes with a 1-1/8" (28.6mm) oversided diameter center and must be used with 1-1/8" diameter risers. Approx. dimensions: 30.5" wide x 3.25" high x 2.5" pullback x 5" center width.Note: Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report. 08-23 H-D e-throttle with 1-1/8" risers