LI-NING Grommets for Badminton Rackets Purchased new from this site and used about 4 times. Round grommets are reduced by about 80 pieces each, but there are still many left. Square grommets for AERO NUT were also used, so about 30 pieces x 2 types are also included. Contents: 4 types of grommets Round: 2.1mm x 13mm, 2.6mm x 9.7mm Square: 2.1 x 7.8mm, 2.6 x 7.0mm Badminton LI-NING Guts String YONEX