Item duplication. 1  Step 1. Have the block you want to duplicate in front of you. ( 2 Examples: Diamond, Gold, or Iron.). 3  Step 2. 4  Now you might want to have a Iron pickaxe or Diamond pickaxe. 5  Step 3. Use you'r pickaxe to quickly mine it.
Heavy Duty/Industrial. A backdraft damper is an isolation damper allowing air in one direction only. Greenheck's HB damper series is designed to prevent back flow at static pressures and velocities up to 20 in. wg and 6400 fpm, respectively.
Heater Cap is a heating system that gently heats the ice and snow coming off of your roof. The system uses a combination of heat disbursement panels and self regulating heating cable. The heating panels melt the ice and snow while a relay of heating cables keep the water melted and flowing through the gutters and down spouts.