[Size]the size can help you to screw directly on the 1LB propane bottles or cylinders. [Solid Brass]These propane bottle caps are made of solid brass, the brass construction make them not easily to break, they can long time for conserving propane. [Easy to Use]You just need screw the brass bottle caps directly on your 1LB propane bottles or cylinders, propane bottle caps are important when you put tank in storage and can keep tank sealed completely, to protect your things from dirt and reduce waste. [Widely Use]These refill propane sealed caps are nice for your barbecue, camping stoves, propane heater, home applications, or anything that uses 1LB propane tank. [Package Include]8PCS 1LB solid brass refill propane bottle caps (Include rubber washers), which can satisfy your quantity requirements to use long time, or deal with your emergency during or working. Colour:gold Material:copper Size:Outer Diameter: 29mm, Height: 15mm Package Contents: 8 x Sealing cap Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.