Rubber that supports various playing styles. - Product Name: JEKYLL & HYDE - Thickness: 1.7 - Hardness: 47.5 - Color: Black It was attached to a Butterfly Innerforce Layer ZLF racket. It is a standard size among Butterfly brand rackets. Trial use was 3 times a week, 2 hours of practice each time, for a usage period of 1 month. 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 email within Mercari. Thank you for viewing.