CE Smith Trailer 11416 2 Straight & 2 Formed Square U-bolt, 3/8" x 3-1/2" x 6- Replacement Parts and Accessories for your Ski Boat, Fishing Boat or Sailboat Trailer 3/8"-16 x 6" long x 3.5" wide with a thread length of 2" Zinc plated 4 U-bolts per kit (2 formed & 2 straight) Nuts and washersnotincluded