The VILTROX E-Z mount adapter is a metal lens adapter with auto-adjustment function. - Brand: VILTROX - Model: E-Z MOUNT ADAPTER - Included items: Instruction manual, lens cap - Features: Auto-adjustment function - Material: Metal Thank you for viewing. I'm willing to negotiate on the price, as I'd like to sell it quickly. Thank you for viewing. I opened it to check the operation, but it's hardly been used. Operation has been confirmed, but I'm listing it as junk just in case. Please refrain from purchasing if you don't understand the meaning of "junk."