Description: 【Specification】: single hole (2.1*6.0mm, 2.1*6.8mm, 2.1*7.9mm, 2.1*13.2mm) and double hole (2.6*6.8mm, 2.6*7.9mm, 2.6*8.5mm, 2.6*10.7mm) Additional: Long and short connecting grommets included 【Comprehensive Size Selection】: This complete badminton racket grommets set includes 9 different sizes ranging from 2.1mm to 2.6mm diameter to fit various racket models 【Nylon Material】: Made from quality nylon these reliable nylon string protectors offer great wear resistance and long term performance 【Large Quantity Value】: With approx 1300 pieces per set this practical racket repair accessories kit provides ample supply for multiple racket repairs and maintenance sessions 【Professional Repair Kit】: Suitable for both single and double string holes this essential badminton maintenance kit meets all racket maintenance needs for players and technicians Size Chart: storage box 13x7x2cm/5.12"x2.76"x0.79" Package Includes: 1 Badminton Racket Grommets Set Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.