Never installed fiberglass Center Brace Support (under-mount) for 1956-57. Hand laid fiberglass piece created in mid to late 80s by our Dad, a perfectionist who taught fiberglass construction for 20+ years. Measures 37.5" one end, 37" on other & 3" wide. Black gel-coat finish. I have 2 of these, priced at $150.00 each plus $15.00 shipping per.