Wall Sleeve for Air Conditioner Installation 7.5cm 3in Outer Dia AC Duct Wall Penetration Pipe 1. This wall penetration sleeve is designed for air conditioner installations, crafted from durable PVC material. With an outer diameter of 7.5cm and a length of 21cm, it ensures secure cable or duct routing through walls while maintaining a clean, professional appearance. 2. Precise Dimensions: 7.5cm outer diameter and 21cm length for compatibility with standard HVAC systems. 3. Durable Material: Made from PVC for high strength, cold resistance, and aging prevention. 4. Weatherproof Design: Resistant to water and environmental wear, suitable for indoor and outdoor use. 5. Safety & Aesthetics: Smooth edges and low-profile design prevent damage to cables and walls. 6. Compatibility: Works with split AC units, heat pumps, and HVAC systems requiring wall penetrations.