Caliber Valves Pvt. Ltd. Manufactures Needle Valves. Caliber Valves Pvt. Ltd. Is an ISO 9001-2000 certified company. The Needle Valves are used in various industries. Specifications of Needle Valves are: Sizes 10mm to 40mm Material AISI 304 / 316 Trim AISI 304 / 316 Type Screwed Bonnet Rating 1000 PSI to 10,000 PSI Ends Screwed