Allows you to apply solvent to a patch or brush without contaminating the action, or your fingers. Tray collects loosened fouling and prevents it from falling into the action. Rubber O-ring seals-off the chamber area to prevent leakage and keeps port securely in place. Mfg: Possum Hollow SPECS: Delrin, white. 3" (7.6cm) long x ¾" (1.9cm) diameter. Fits M1 Garand, M1A and M14.