Discs - 20 mm Ø self adhesive discs x 50
Details
Discs - 20 mm Ø, sets of 50 self adhesive white Dacron discs.
Sail reinforcement/repair material, for repairs and reinforcement of sails especially over the end of battens, at the luff where eyelets will be added, and at the tack and head of foresails/mainsails over the ends of the luff tape.
Disc seems to be the English English word. Disk may be the American English word.
S-DISK.