... steel, high classWe owe 15 yeas experiences in silicone oil rotary damper, and we always control the quality from the very ... original material.LF-33, ROTARY DAMPER, OPERATION ANGLE 110°, CLOCKWISE OR COUNTER CLOCKWISE, STAINLESS STEEL, ... test.8/ Life Cycle TestDamper units to be assembled with toilet seatand tested on open /close cycle tester. Machine lifts ring ...