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Two options : 50mu and Reinforced Heavy duty.
Spinnaker Repair Tape - White
Kite repair tape
Kevlar Repair Tape
Heavy Duty Sail Repair Tape
Mylar Repair Tape
Dacron Sail repair Patch
PSP Tape - Dracon Repair Patch - White
Dacron Insignia Tape
Mast Collar Tape - White
Duck Tape