These are Viton size 025 O-rings for the Sherco/Scorpa USFS approved spark arrestor end cap insert ST-3 & ST-4 adapter. Includes qty 2 O-rings.
Part# RP-OR-025 Technical Data:
O-ring-Material: Viton, Size:25
Qty-2
Weight- 0.5grams/0.02oz (for qty 2)