ITEM NAME:PC Cooling System G1/4 Transparent Acrylic Water Flow Meter Monitor A#S Product Description Description: Specification: Material: approx. 43 X 43 X 28 mm/1.69 X 1.69 X 1.1 in Weight: approx. 150 g Thread Type: G1/4, 4 mm length Material: PMMA Sealing: inner O-shape sealing circle Included: 1 X PC Water Cooling System Flow Meter.Thread Type: G1/4, 4 mm length. Weight: approx. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. Mon. to Sat. Sealing: inner O-shape sealing circle.