20mm ball with double T fits the LM-300HD

PRODUCT FEATURES Adapter converts 20mm ball pedestals to make them Dual-T compatible Fits onto Lido heavy-duty mounting pedestals featuring the 20mm ball pattern Compatible with Lido Dual T-Slot holders 2 year limited warranty PRODUCT DETAILS LM-20-2T is a versatile adapter that allows you to convert a 20mm ball pattern pedestal into one that is Dual-T compatible (holders sold separately). This includes only the 20mm Swivel Ball to Dual T-Tab Adapter. (Mounts, holders, and devices sold separately.)