A height adjuster for a vehicle safety restraint comprising: a rail for providing a vertical path guide for a carrier ; the carrier configured to be vertically movable along the rail to one of a plurality of locations, the carrier also configured to rotationally support the web guide. The step notched structure includes a bottom notched portion that is wider than the second notched portion formed thereover. The second circuit may be configured to operate in a first mode in response to a first state of a second control signal and a second mode in response to a second state of the second control signal. After formation and planarization of a contact-level dielectric layer, passing gate lines are formed above the contact-level dielectric layer in a line level to provide electrical connections to the gate electrodes. Further provided is a liquid mixture for forming a low refractive index coating, an article comprising a substrate having an anti-reflective coating, and a method for forming an anti-reflective coating on a substrate. The adaptor guides an instrument through the working channel of the endoscope and prevents bumps from forming in the working channel of the endoscope shaft.