1. Base Pipe: API Spec 5CT Casing Pipe 2. Steel Grade: API Spec 5CT J55 K55 N80 L80 P110 3. OD: 4.5''-7'' 4. Length: R1 R2 R3 5. Slot width: 0.15-4mm ±0.03mm 6. Slot length: 60-120mm ±1.0mm 7. Slots around circumference:as per the order 8.The distance between adjacent slots:as per the order 9.Slot Surface: Hard-quenched