[Size]the size can help you to screw directly on the 1LB propane bottles or cylinders. [Solid ]These propane bottle caps are made of solid , the construction make not easily to break, they can serve long time for conserving propane. [Easy to ]You just need screw the bottle caps directly on your 1LB propane bottles or cylinders, propane bottle caps are important when you put tank in and can keep tank sealed completely, to your things from dirt and reduce waste. [Widely ]These refill propane sealed caps are for your barbecue, camping , propane heater, home applications, or anything uses 1LB propane tank. [Package Include]8PCS 1LB solid refill propane bottle caps (Include rubber washers), which can satisfy your requirements for you to 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.