TOOGOO(R) Black Battery Holder 4 Pins for 2x18650 Rechargeable Li-ion Batteries Product Name : Battery Holder;Fit for : 2 x 18650 Rechargeable Li-ion Battery (Not included here) Material : Hard Plastic, Metal;Color : Black Size : 78 x 40 x 21mm/3.1" x 1.6" x 0.83"(L*W*H) Weight : 15g Package Content : 1 x 18650 Battery Holder