T-H Marine T H Marine Tsp 1 Transom Support Plate For Top Bolt Holes TSP-1 BULK. Cast in high quality aluminum. All plates are 3/8" thick. Fits top bolt pattern of outboard. Generic plate with no lettering is standard but custom logos and black painting can be produced with minimum quantities. Features of T-H Marine TSP-1 BULK T H Marine Tsp 1 Transom Support Plate For Top Bolt Holes Distributes stress of engine bolts Cast in high quality aluminum All plates are 3/8" thick Fits top bolt pattern of outboard Package Contents: T-H Marine TSP-1 BULK T H Marine Tsp 1 Transom Support Plate For Top Bolt Holes T-H Marine TSP-1 BULK: T H Marine Tsp 1 Transom Support Plate For Top Bolt Holes