
Fully Functional Semi Grouted Sleeve Suitable for Various Building Types Such as Residential, Commercial, Industrial, etc. High-Strength Material: Made of 45# high-quality seamless steel pipe with stable process performance. Precision Manufacturing: Heating diameter reduction prevents cracks; precision turning ensures smooth installation. Wide Application: Suitable for residential, commercial, and industrial building types. Cost-Effective Design: Matches PVC/PE pipe sizes to reduce auxiliary material costs. Factory Direct Sales: Direct factory sales offer discounted prices without trading company markup. Strict Quality Control: 100% product testing before shipment ensures high quality and safety. Customization Options: Supports OEM/ODM services with customizable reinforcement steel diameter. Certified Quality: Products certified with CCC, CE, and ISO standards for building safety.