1.8mm green rubber with high spin performance. - Brand: XIOM - Model: CHINA HYBRID PRO - Thickness: 1.8mm - Color: Black It was attached to a Butterfly SK Carbon blade. I used it for one month, with test plays three times a week for two hours each time. Size Length: 155mm Width: 148mm Bottom: 92mm Thank you for viewing. This is a used item. Please understand this before purchasing. If you have any questions, please contact me via Mercari's messaging system. Thank you for viewing.