This product is a professional gastank refill .

Featurtes:
It is easy to operate and can quickly complete refilling.
Made of fine quality brass, wear-resistant for long using .
Dual rubberring, tight connection, prevents leakage.
Safer refilling.

Specifications:
Quantity: 1pcs, 2pcs, 3pcs (optional)
Material: brass
Color:
Buttom hole diameter: 4mm
Upper rod diameter: 2.5mm
Item size: 17.6 * 9.7mm / 0.7 * 0.4in
Item weight: 6.8g / 0.2ounce
Package size:
1pcs: 18 * 10 * 10mm / 0.7 * 0.4 * 0.4in
2pcs: 20 * 20 * 10mm / 0.8 * 0.8 * 0.4in
3pcs: 30 * 20 * 20mm / 1.2 * 0.8 * 0.8in
Package weight:
1pcs: 7g / 0.2ounce
2pcs: 14g / 0.5ounce
3pcs: 22g / 0.8ounce

Packing List:
1pcs:

1 * Gastank Refill

2pcs:
2 * Gastank Refill

3pcs:
3 * Gastank Refill