Replacement Fuel Filter.
Steel Canister type fits on 1984-1991, although some 1984-1985 models came with a square plastic filter. Be sure to double check which style your Vanagon has before placing your order.
Steel Canister = Volkswagen part No: 1H0 201 511 A Bosch No: 0-450-905-030
Square Plastic = Volkswagen part No: 133 133 511