1.Mouse tray chair armrest with memory foam adjustable arm rest, memory foam wrist rest protects your hands.Mouse pad accessories for office/home chairs can be used to extend or strengthen the arm to support the mouse platform, and mouse armrest accessories for chairs can reduce pressure on the neck, shoulders, arms and wrists.Memory cotton cushion, solid aluminum alloy slider, height adjustment, metal skateboard, Aluminum alloy decorative pieces, magic belt. 2.office chair arm rest extender,Length-width increase arm pad attchment Tied to a chair elbow rest, Arm rests chair mouse tray for office chair,High quality construction: Our armrest extensions are made of high quality materials, the plastic upper and lower covers are made of durable plastic ABS, and the brackets are made of tough special materials.Soft and carefully filled design ensures comfort and support for your arm, strong support, reduce arm pressure and improve work efficiency. 3.Height adjustment computer chair arm rest tray, you can adjust the height of the armrest is flush with the desktop, supporting the elbow rest, not a simple increase, but more comfortable care, relax your arm, support your elbow, reduce joint pressure, the height can be ly adjusted to meet different needs. 4.Easy installation chair arm support mouse pad, no tools, no hassles! Installing our arm rest chair cushions was very easy, Simply place it on the arm of the chair, the magic strap is fixed, and it is easy to remove. - No drill, glue or tape required. Package included: Only 1 armrest pad,doesn't come as a pair.If you need to buy in pairs,select quantity '2',thank you.