1inch Kiln Post - 4 Pack KILN POST - Four 1-inch kiln posts for use with drop molds. ELEVATE - Use to elevate slumping molds preventing entrapped air. VENT - Use to vent heat by propping the kiln lid open or elevate kiln shelves off the floor of the kiln. 4-PACK - Includes four (4) 1-inch kiln posts.