
Cq High Quality Vr Exothermic and Insulating Feeder Riser Sleeve. High Exothermic Efficiency: Low density and accurate size ensure excellent feeding effect for cast iron and steel. Customizable Specifications: XP/BP series allow customization of gap and vent hole sizes via core shooting or vacuum molding. ISO9001 Certified Quality: Complete QC system for chemical and physical properties with quality certificates provided. OEM/ODM Service Available: We accept OEM service and have an R&D department for new product development. Fast Lead Time: Typical production lead time is 15-20 days after receiving the purchase order. Versatile Application: Suitable for molten iron and steel feeding, improving casting yield and density. Multiple Manufacturing Tech: Produced via vacuum molding, core shooting, and cold core triethylamine technologies. Factory Direct Supply: Direct manufacturer with 26,000 sqm plant area and 6 R&D engineers.