Features: Door Made of stainless steel material, anti-rusty, safe and environmentally friendly, healthy, safe and harmless to nature. Install it on the beehive to make it easy for bees to go in and out,save time and increase effective. A good helper tool for the beekeeper. Safe and healthy. Easy to use. Simple to operate, high performing, and cost-effective,easy to install. For timely flowing of the air in the beehive,Four access methods: fully open, queen excluded, closed ventilation and fully closed. Specification: Condition: 100% Brand New Color: Sliver Material: Stainless steel Inlet disc diameter: 6.8 cm / 2.68 inch (appr.) Package Included: 5 x Beehives Nest Door Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Door Made of stainless steel material, anti-rusty, safe and environmentally friendly, healthy, safe and harmless to nature. Install it on the beehive to make it easy for bees to go in and out,save time and increase effective. A good helper tool for the beekeeper. Safe and healthy. Easy to use. Simple to operate, high performing, and cost-effective,easy to install. For timely flowing of the air in the beehive,Four access methods: fully open, queen excluded, closed ventilation and fully closed.