uxcell 4mm Inner Dia H13*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts wix and the rubber outer coating

and the rubber outer coating makes this device both safe and durable

HI-FI tone quality: durable with wear-resistance anti-oxidation gold-plated connector that could better match audio devices to reduce interference and transmit HI-FI audibility signal and thereby provide non-loss and ultra clear stereo sound experience

Auto OFF Timer Portrait Light and Brightness Adjustable Easily - Press 1HR

Depth micrometers measure the height

Adjustable potentiometer: there's an interior potentiometer for accuracy adjustment

uxcell 4mm Inner Dia H13*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts wix and the rubber outer coatinguxcell 4mm Inner Dia H13*D10 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector for DIY Parts Product Features Inner Diameter: 4mm 0. 16 inch, Total Height: 13mm 0. 51 inch, Cylinder Outer Diameter: 10mm 0. 39 inch, Cylinder Height: 10mm 0. 39 inch, Base Diameter: 22mm 0. 87 inch, Base Height: 3mm 0. 12 inch, Mounting Hole Distance: 16mm 0. 63 inch,2 x M3 Fastening Screws Type: Flange Shaft Coupling, suitable for model shaft connection,