1), Product Information Vortex manufactures many different types of ductile iron couplings for many kind pipes(PVC/UPVC,AC,Steel etc) We supply coupling for all over the world and product surface shall be smooth and free from sand holes, blow holes, distortion or any other defects. 2), Material Body: Ductile iron grade 500-7/ 450-10 in accordance with ISO 1083 or 70-50-05/65-45-12 with ASTM A536 Gland: Steel/Ductile iron grade 500-7/ 450-10 in accordance with ISO 1083 or 70-50-05/65-45-12 with ASTM A536 Gasket: Rubber E. P. D. M. /SBR/NR in accordance with EN 681.1 T-BOLTS AND NUTS: Carbon steel grade 8.8/6.8/4.8 with dacromet coating/galvanization 3), Process Resin Sand Molding Boards Green Sand with hand molding 4), Inscription Style As per customers' requests Standard Inscription(EN545;PN--;DNí¬OD--). 5), Packing Wood crates Wood pallets As per customers' requirements . 6), Inspection Foundry in-house Third Party inspection available upon request . More information is available upon receipt of your enquiry.