Motorcycle Tank Bag Adapter QUICK-LOCK Easy Lock Tank Ring General Parts (Nylon Ring)Tank adapter Nylon ring(Use with Tankring ) uses an engineering grade, 60% long glass fiber nylon 6. 6 throughout all its bolt on Secondary Engine Covers. This nylon is stronger, more flexible, oil and fire resistant and most of all extremely impact resistant. The long fibers absorb more energy before and after fracture initiates. Fracture crack lines are forced around the fiber ends, resulting in a limited fracture area. Condition: Aftermarket 100%