this wooden box holds 4 x 21700 batteries securely with one hinge and one latch.
the batteries will not get stuck in this box as there is a 1mm differ in diameter.
one in quantity.
this item is small enough to fit in a pocket.
external approx 112mm x 101mm (4.4 inch x3.9inch)
internal approx 4 round holes at 22mm x 71.5mm (7/8 inch x 2.83 inch)