Universal Flexible Black-Plastic Nozzle for Gas Cans with a 3-Tiered Thread openings This flexible black-plastic nozzle for gas cans has a 3-tiered thread to fit almost all commercial plastic bottle openings from 28mm to 43mm. (The bottom thread fits the standard gas-can top, slice the scored bottom off to get to the smaller threads for short-necked bottles) The spout is 9" long with a 7/8" ID.