Check the listing for details. Nittaku Fast Arc G-1 Rubber 2.1mm Red. Condition: New. Listed at 49.00 USD. Nittaku Fastarc G-1 is a highly popular, premium German-made, Japanese-designed rubber, often considered a durable and more affordable alternative to Butterfly Tenergy 05. Pros: Outstanding spin-to-price ratio, very durable, high safety margin, versatile for both near and mid-table play.