Physical description
A small carton (.2) containing a used tether tennis ball (.1), and, a string and elastic tether (.3). Inscription across one face of the box: THE PERFECT/KUM-BAK/.../TENNIS SELF-TRAINER/... Across another: THIS CARTON/CONTAINS -/ONE TENNIS/AUTO COACH/CAPTIVE BALL/COMPLETE WITH/ATTACHMENTS. Materials: Rubber, Felt, String, Metal, Cardboard, Paper, Ink