HQMPC is a registered trademark in US, the serial No is 87368276. We are a manufacturer and retailer from 2009. We have much experience producing good quality products to USA market. This item of garden hose connector are made of high grade plastic. Specifications: - Plastic Garden Hose Connector Garden Hose Adapter Double Female Male Nipple 3/4"Female Male Coupler ( Connector 3/4 Inch GHT), Plastic Package Includes: 10pcs connectors