1. Pneumatic Protection – IQS bulkhead fitting for externally calibrated pneumatic hoses 4 mm / 6 mm / 8 mm / 10 mm / 12 mm. Straight bulkhead fittings enable the direct connection of two externally calibrated pneumatic hoses of the same diameter through a bulkhead wall, secured by two hex nuts. 2. Quality – The pneumatic bulkhead fitting is crafted from materials. Body: brass, release ring: PA 66, seal: NBR, stainless steel retaining claws. Ensures a dependable and secure connection for your compressed air line. 3. Reliable Design: Compressed air bulkhead fitting with an operating temperature range of 20°C to 75°C, operating pressure range of 0.95 to 12 bar, and compatible hose diameters of 4 mm / 6 mm / 8 mm / 10 mm / 12 mm (outer). Suitable for oiled and unoiled compressed air, neutral gases, and water. IQS Quick Connector PushIn. 4. 1 x straight cable connector/bulkhead connector for your selected hose diameter (4 to 12 mm).