Dexter Russell Aluminum Pre Drilled Drip Cap Mill 22" MILL 22". Constructed of durable aluminum material with a mill finish. The drip cap features a 22" length. Drip caps can be used on the following applications: RV doors mobile home doors storage doors generator doors windows and more. Features of Dexter Russell 3216DC MILL 22" Aluminum Pre Drilled Drip Cap Mill 22" Pre-drilled drip cap Constructed of durable aluminum material with a mill finish Drip Cap Length: 22" Can be used on the following applications: RV doors mobile home doors storage doors generator doors windows and more Package Contents: Dexter Russell 3216DC MILL 22" Aluminum Pre Drilled Drip Cap Mill 22" Dexter Russell 3216DC MILL 22": Aluminum Pre Drilled Drip Cap Mill 22"