- Brand: YONEX - Model Name: ASTROX99 PRO Gen2 - Color: White Tiger - Grip Size: G5 - No original grip - Kento Momota model Thank you for viewing. I received this as a gift, used it a few times, but it doesn't suit me, so I'm selling it. The string is Gosen, 0.65mm, at 27 lbs. (It's about to break soon) This is a very popular model and is in excellent condition with no major scratches or paint chips. It's almost like new. Also, if you are looking for a 4U, please purchase it as soon as possible. The latest Gen3 is said to be similar to Gen1, so those who like this model, please take a look.