Malossi brand variator for the Vespa ET4. From the Malossi website:

Multivar is very easy to fit and to modify. It is developed in detail and for specific applications. With a variator that features such sophistication, your scooter has that extra sprint, a consistency in shifting, a greater mechanical ease at high speeds and a constancy in performance you've never experienced before with the original variator.

Contains 14g rollers.

Specifications
Outer Diameter: 121 mm
Inner Diameter: 16 mm
Spline Count: 21
Fast order processing.

Important Parts Notice:  Not all replacement or upgrade parts come with instructions. It is the customer's responsibility to have standard knowledge of the installation or hire an experienced installer. We are not responsible for any damage caused by any of the items we sell, whether installed by you or a professional. We are not required to provide step-by-step instructions or technical support. In any case, we will always do our best to help you with any technical questions. Electrical parts are non-returnable, and the buyer assumes all risks. 

Important Notes

Address Change Request
Address change requests will never be accepted. Please make sure you choose the correct shipping address before completing your order. If you need to change your address, you must cancel the original order and place a new one with the correct shipping address.