The Exo Terra Light Bracket is designed to suspend the Exo Terra Light Dome or other types domes or wire fixtures above any Exo Terra Natural Terrarium or other glass terrarium securely. The Exo Terra Light Bracket easily adjusts to fit most types of fixtures or can be used to regulate heat light according to required terrarium conditions by moving the rubber washers. BOX CONTAINS Each order comes with 1 x Exo Terra Bracket for Light Domes, PT2223can be used to regulate heat light according to required terrarium conditions. easily adjusts to fit most types of fixtures. designed to suspend the Exo Terra Light Dome.