O-Rings Nitrile Rubber 44mm Inner Diameter 47mm OD 1.5mm Width Round Seal Gasket 50 Pcs 9mmx20mmx6mm ensure that the screws are

ensure that the screws are screwed into the ceiling joists

Switch Size: 7x2

Thread Size: G1/2 x G1/2

they can fasten and loosen easily

O-Rings Nitrile Rubber 44mm Inner Diameter 47mm OD 1.5mm Width Round Seal Gasket 50 Pcs 9mmx20mmx6mm ensure that the screws areSpecifications: Inner Diameter: 44mm 1. 73 inch Outside Diameter: 47mm 1. 85 inch Cross Section Diameter: 1. 5mm 0. 06 inch Package Contents: 50(+ 2%)pcs x O Ring Descriptions: 1. They are circular in shape, round in cross section. For use across a wide temperature range from 4 ( 20C) to 212 (100C). 2. Nitrile Rubber or Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Good resistance to many