... price 2. OEM service 3. Delivery in time Tee of Grooved couplings and fittings1) Material: Ductile iron ASTM A536 GRADE 65-45 ... : Powder Coated 4) Color: Red (Color can be as per the customer's requirement )5) Payment: T/T , L/C "BEAR ... Wilda Machinery Co.,Ltd" 's Casting Processing Department. is specialized in manufacturing of ductile iron grooved fittings,Grooved couplings,couplings, castings, pipe ...