... product with excellent quality for our customers.size: 35/75, 45/90, 45/100, 50/105, 55/110, 60/125, 80/143 ... : nitriding treatment, alloy coating spraying, heating treatment, screw fully hardeningDiameter: Φ45-Φ200(according to the demands of customers)L/D ratio of ... screw: 16-35Conical dual-hole barrel screw specificaiton: Φ25Φ45-Φ92Φ188(according to the demands of customers) The screw ...