Fluorescent Lamp Socket - TOOGOO(R) 10Pcs Dual Terminals T5 T4 Fluorescent Tube Bulb Lamp Holder Socket Product Name : Fluorescent Lamp Holder Fit Fluorescent Lamp : T5 T4 Size(Each One) : 28 x 22 x 19mm / 1.1" x 0.87" x 0.75"(L*W*T) Mounting Hole Diameter : 3.5mm/ 0.14"