Capping the plastic to protect the teeth of the band saw blade 
00685A: COVER RANGES WIDTH: 19MM-41MM 
00685B: COVER RANGES WIDTH: 19MM-54MM 
00685C: COVER RANGES WIDTH: 19MM-67MM 
Plastic Protect cap     
Colour: White&transparent, Blue, Orange, Red 
Size: 7mm, 8.2mm, 10mm...