Spherical contact surface automatically aligns nipple with the angle of spoke
ProLock: pre-prepped/treated nipple threads with special compound
Squorx Pro Head design is excellent for building/truing at nipple head, 15mm overall length with a 12mm wheel building calculator dimension
PHR washer use is necessary if used with 1 series rims
Aluminum: forged, machined nipple with full length threading, anodized