Black vinyl seat
18 ” long, 7.5″ wide at back tapers to 5 1/2″ wide at front x “5” tall at rear.
Has 3 threaded mounting holes in solid wood base So holes are a triangle
Front hole is 10 1/8″ to each rear hole
Rear holes are 3 1/2″ apart
ALSO 3 EXTRA THREADED INSERTS ARE INCLUDED