BEST Fittings Quick Connect Cylinder Pressure Test/Dust Plug

Combined Dust Plug & Cylinder Residual Pressure Test Plug. Fits BEST Fittings QC02 Socket & is compatible with Foster 12FS, 12FSS and 12MS Straight Thru Quick Snap Couplers. Essential to the keep the nasties out of your prized shooting tool, and quickly test your cylinder pressure in moments! Operating instructions included.