The Tamron Lens Hood for 100-400 mm G2 A035 lens is designed to protect the lens from damage and impact, while also blocking stray light and preventing lens flare. It features a strong and durable construction, with a bayonet mount for easy attachment and reversible fit for convenient storage. Specifically made for the Tamron 100-400 mm f4.5-6.3 Di VC USD lens, it boasts a dedicated petal design.