90-00-0600 – 600 lb. max tongue weight / 6,000 lb. max trailer weight

90-00-1000 – 1,000 lb. max tongue weight / 10,000 lb. max trailer weight

90-00-1200 – 1,200 lb. max tongue weight / 12,000 lb. max trailer weight

90-00-1400 – 1,400 lb. max tongue weight / 14,000 lb. max trailer weight

* Your model # can be found on the stickers on either spring arm. Make a note of it for future reference**

** Read entire manual before starting installation**