Ergowriter Transfer Benches lluvia™ is IP68 Waterproof Certified❗What 14272 lluvia™ is IP68 Waterproof Certified❗What does this mean Foam base may be wiped with damp cloth * Neoprene rubber cushion insert can be patched or repaired to extend use * Customized Jay foam base and ROHO air insert are fluid resistant * Cushion size:18 W x 18 D * Wide ranges of sizes also available to fit chair widths 14 to 24 upon request * Weight capacity: 550 lbs * HCPCS Suggested Code: E2622 * 2 year warranty Designed to alleviate the pain of writing associated with arthritis and other hand afflictions * Comfortably and correctly positions the thumb to reduce stress placed on the wrist * Can be used with most standard pens and pencils * Pen included blue ink * For right or left hand use *