1、4 in 2 adapter provides continuous gas supply to your stove, need not frequently replace your gas tanks. 2、Safe counter-current protection, each adapter independently supplies gas to outdoor stove, which does not affect the use of one/two gas tanks and not worry about leakage for other adapters. 3、This 4 in 2 butane adapter is stack-able, makes 5-in-1, 7-in-1 and 8-in-1 use possible. 4、Extension hose increases the distance between your stove and your gas tank. Lightweight and small size for convenient storage. 5、Suitable for camping, hiking, fishing, backpacking etc. Features: 4 in 2 adapter provides continuous gas supply to your stove, need not frequently replace your gas tanks. Safe counter-current protection, each adapter independently supplies gas to outdoor stove, which does not affect the use of one/two gas tanks and not worry about leakage for other adapters. This 4 in 2 butane adapter is stack-able, makes 5-in-1, 7-in-1 and 8-in-1 use possible. Extension hose increases the distance between your stove and your gas tank. Lightweight and small size for convenient storage. Suitable for camping, hiking, fishing, backpacking etc. Specification: Material: Aluminum alloy + Stainless steel + Copper - Butane Adapter Folded Size: 28.5 * 5 * 4.5cm / 11.2 * 2.0 * 1.8 in Unfold Size: 28 * 7 * 4.5cm / 11.0 * 2.8 * 1.8 in Weight: 625g / 22oz - Extension Hose Size: 28.5 * 1.9cm / 11.4 * 2.4 * 0.7in Weight: approx. 50g / 1.8oz Package List: 1 * 4 In 2 Butane Adapter 1 * Extension Hose 1 * 4 In 2 Butane Adapter 1 * Extension Hose