1.Super silent sweep movement 2.Sweep movement 3.Accuracy: 1sec/day ... -8monthsTime accuracy1secs/dayBack covertransparentMaterialABSItem no. 6262Net weight26gShaft length12mmSupply shaft length7, 8, 9, 10, 12, 13.5, 16.5, 18.5, 21 ... , with poly foam insideMeasure of carton375x365x355mmPayment termsT/TMerit1.stable quality2.super silent 3.stable inner structure, can not be damaged easily ...