This must be printed with support. Infill can be greater than 50%. Layer height .2-.3 Valve goes directly with mask by Budash and allows for more compliant material to be used. It also minimizes health hazard of material being inhaled and lodged within the trachea. Unless you have a laser cutter, I suggest purchasing a 3/4" hammer driven hole punch from McMaster-Carr for valve diaphragm and 0.006" thick material.