Match your sport skill level and altitude with the appropriate speed shuttlecock for your badminton needs. Moving fast, medium, or slow, these tournament quality Carlton T800 Smart Speed Shuttlecocks arrive with six to a tube. * Promotes hand and eye coordination. Tournament play quality. Set included 2 tubes of 6. Each type is designed for either slow speed/high altitude, medium speed/normal or fast speed/warm. 5 Grams each