[High ]The mounting bracket is made of high quality silver stainless steel bracket, and not easy to break. The wheels are solid, not hallow, made of nylon, it's not easy to deformed, the nylon of the wheels are smooth so that it's more easy to move. [Universal Patio Heater Wheel Kit] Replacement parts size: Product Length = 7.8 inch, Installation Spacing = 3.93 inch.This Patio Heater Wheel Kit fits all of the patio heaters. The wheels are solid, no need to worry about its damage, keeping long service life. [Easy to Install] We have installed the set of replacement part of the the outdoor heater wheel used for patio propane, no need to install any parts after you received it. You only needs to be hooked of the patio heater, which is easy to install and low maintenance cost. [Widely Applications]Universal fits most Patio Heaters which have a round base outdoor mushroom umbrella heaters. Suitable for most major patio heaters, you can easily move the heater to anywhere. whether you're at your office, your room, your yard and so on, you can move the patio heater at any time. Colour:As Shown Material:Stainless steel Package Contents: 2 * Wheels 2 * Mounting Brackets 2 * Nuts 2 * Bolts Only the above package content, other products are not included. Note: Light reflection 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.