The opening includes a cylindrical recess and four tapered slits extending from {TAIL ~ the base} of the recess to a point shaped opening at {HEAD ~ the other side} of said valve body 
The opening includes a cylindrical recess and four tapered slits extending from { TAIL ~ the base } of the recess to a point shaped opening at { HEAD ~ the other side } of said valve body
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH