Looks like the picture on a rip tko 300. 

Precision machined from TI-6 series TITANIUM, this collar delivers high strength-to-weight ratio!

TITANIUM 15 grain collar increase FOC (Front of Center) weight on your arrows. This allows for tighter groups when target shooting, and deeper penetration on big game. Fits flush with our 5/16" field points. 

Diameter=.310 OD .270 ID  MAKE SURE TO CHECK YOUR ARROW SIZE TO GET CORRECT FIT

TEST COMPONENTS FOR FIT AND FUNCTION BEFORE GLUING.