Exmark Ultra Vac QDS collection system for Lazer HP. It may also fit the Ct model but I have not checked. It came new on my Lazer HP and was only used a few times. It is one year old but looks like new. I am selling it because I don't get many leafs and I do not bag my grass. It works great, I just need to make more room in my shed. It is the QDS model that allows you to remain seated while dumping the hopper by simply pulling a lever, a very time saving idea that comes in handy. It comes with a spare belt and a parts and owners manual. It is quick attach and easily goes on and off in minutes. Homeowner use only.