I have a service that restores teak patio furniture in Colorado, USA. The chair sliders are an important upgrade to my customers furniture as it screws in holding tight, the brown color matches the sealer, and it lifts the furniture above the ground keeping it from wicking moisture from the patio, dries more quickly after snow and rain, reduces the likelihood of water staining on the legs and makes the furniture easier to slide on the ground, preventing the legs from chipping and cracking. There is nothing comparable available in the United States.