Technical control for silicone bats, with an inner diameter of 18mm for improved fit. Black color, stored unopened for about 3 years. Due to the thickness of the case, I will open it and ship only the contents and the backing card! - Brand: Promark - Product Name: Technical Control - Application: For baseball bats - Material: Silicone - Size: Inner diameter 18mm Please understand that this is a private sale and the packaging will be done by an amateur. Thank you for viewing.