This article provides information on Elo's Stylus Tray 

https://www.elotouch.com/accessories-stylus-tray-e574912.html

Stylus Tray Specifications

Part Number(s)
E574912

Enclosure Color
Black

Compatibility
3203L, 4303L, 5053L, 5503L, 5553L, 6553L

Dimensions
7.08" x 3" x 1.73" / 179.8 mm x 76.2 mm x 44 mm

MTBF
50,000 hours demonstrated

Warranty
3-year