Currently, only one species, Trichoplax adhaerens, is acknowledged to belong to the Placozoa. The Italian Francesco Saverio Monticelli described another species in 1893, which he found in the waters around Naples, naming it Treptoplax reptans.
A standard mallet has a head length of 9 to 9.5, and this is recommended for beginners. Expert players may use longer head lengths up to 12, as this is thought to make aiming more accurate and makes it harder to accidentally twist the mallet during the stroke.
Specially formulated heat shrink sleeve increases racquet handle size by 1/8 (one full grip size) per application. For larger increases, several Grip Build-Up Sleeves may be used. Simply slip sleeve on bare handle (no grip) and apply with a heat gun or hair dryer on the high setting.