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The Invacare Single Density cushion is an economical comfort cushion that is available in over 100 non-standard sizes. Standard sizes 16"x16", 16"x18", 18"x16", 18"x18", 20"x16", 20"x18" are NOT AVAILABLE available as Single Density. Invacare Absolute cushion is used for standard sizes.
Please Note: The sizes 16"x16", 16"x18", 18"x16", 18"x18", 20"x16", 20"x18" are not available as Single Density, please refer to the Absolute Cushion.