43.3" long Williams stainless steel side rail set used on many games from 1989 to 1990.
Each of these side rails has only 1 square carriage bolt hole at the front; no other holes besides the flipper button holes are in these side rails.  A list of the games that used these side rails is below (may not be a complete list).
Please double check your machine to make sure these are the correct side rails for your game.
Game usage list:
Earthshaker
Bride of Pinbot
Police Force
Bad Cats
Whirlwind
Rollergames
Diner
Funhouse (early production only)
Williams reference numbers B-12588-L & B-12588-R.