Novent R410A 2-Pack with Multi-Key: (2) 1/4" R410A Pink Caps & (1) Novent Multikey # 86698 Images Shown for Representation Only 1/4" Thread Size Locking Cap with NVMULTIKEY Universal Key , Fits ALL Novent Caps Helps prevent loss from equipment, cylinders and recovery tanks Locks in place to prevent refrigerant loss Replaces / Supersedes: Novent Locking Cap , Rectorseal , 86681 , NP-R410 10PK , CD2290 , NOVENT , JB and others