These are Viton size 123 O-rings for the 2023GasGas GGT-4 spark arrestor (requires qty 1), Beta BT-3 spark arrestor (requires qty 2) and Beta spark arrestor adapter BT-4 (requires qty 2).
Includes qty 2 O-rings.
Part# RP-OR-123 Technical Data:
O-ring-Material: Viton, Size:123
Qty-2
Weight- 1grams/0.04oz (for qty 2)