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Only for height no other reason.
Sorry, there was a problem. Please try again later.A riser is not required for installation but is available as an optional accessory. For installation, the floor must be a hard surface with a maximum slope of 1/2” per foot. To make sure the Combo does not vibrate or move, you may have to reinforce the floor. If the floor is in poor condition, use 3/4” impregnated plywood sheet solidly attached to existing floor covering.
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