This keyguard fits the SolidTek ACU-595U Mini keyboard, also sold under the Adesso brand, and sometimes having different model numbers, including ACK-595UB, KB-595BU, KB-595BP, 595 PS2.  Also available for French Canadian ACK-595U-CF. 

This item does not come with a keyboard. This is to order the keyguard only.

The default keyguard comes with no attachment method.  It's up to you to mount the keyguard on the keyboard with something like Velcro or double-sided tape.  However, you can optionally order it with Velcro or attached straps to hold it in place.

Material - The keys are just under 1/8" high, so if you pick an 1/8" material, the top of the keys will be just below the surface of the keyboard.  Most people prefer a material of 3/16" or greater, to give a little depth to the holes, requiring a more deliberate touch. 1/4" materials make for even deeper holes. A popular choice is polycarbonate, which has a lifetime guarantee against breakage and nice, bevelled edges which make the keyguard softer to the touch.