These are drive on ramps  for large trucks, they are rated at 40,000 pounds.  They are made 

to handle any vechicle, cars,  lite and heavy trucks. Good for getting under your semi truck

tractor, grain trucks, even pickups.  I used them to change the oil on all my medium duty

tow    trucks, and my diesel pickup. It  gives plenty of clearence to get under them to change

oil.  They have an undercarriage lift so you can elevate them and pull them around on

a concrete floor.

I paid a little under $400. each for them plus shipping.  Ill take $500. for the pair. they are

in Ellsworth kansas my shop number is 785-531-0723  thats my cell number so you can

reach  most any day at a reasonable time.