The Diamond 1.1 Tweeters are a are 1 in titanium diaphram and neo magnet tweeter, that boast a 100WRMS rating these are meant to excel in extreme SPL environments while maintaning a sound quality level to improve any large SPL build. 
 
Mounting Diameter- 2.25 inches
Mounting Depth- 1 3/8 inches
200 RMS Rating
SPL-105db
Nominal diameter 1 inch