Main technical indexes: 1) Operating temperature: -30°C ~ +60°C2) Relative humidity: ≤85%3) Ambient atmosphere pressure: 70 - 106MPa4) Specification: 10 pairs, 20 pairs, 30 pairs, 50 pairs, 100 pairs, 200 pairs producing area:Hangzhou,China payment:L/C,T/T supplying capacity:500 Piece/Pieces per Day