This is a Jacobsen Aero King 1321 slit seeder/verticutter. I bought it new in the spring of 2001. It has approx. 15 hours on it. The seed box holds about 30 pounds of seed. It has a divider so that you can drop two different kinds of seed and different rates. It's self propelled with a 13hp Honda engine. Seed spacing is 1.5" (the closest of it's kind). It has left and right braking to help make turns. In the front of the machine it has cutting blades that cuts grooves. In the back of the machine it has discs that ride in those groove and directly behind the disc as "shoes" where the seed drops. This is an awesome machine and does a great job.!!! Price new is $5400 + tax. I am asking $4000 firm. You can PM me or call me in Wichita, Kansas at 316-832-0337. I have other pics available. Thanks for looking.