Automatic door bottom, mortised, 17 x 35 mm aluminium, 15 mm drop, bulb seal, ball-tip plunger

Automatic door bottom, mortised. The U-section body sits inside a groove routed along the bottom edge of the leaf, out of sight. As the door closes, the plunger at the end of the bar meets the frame and drops the seal onto the floor; as it opens, the seal lifts clear and does not drag. The mill states it keeps out dust, odour, insects, draughts, noise and light at the door bottom.

The plunger at the end of the bar has a ball tip that bears on the frame. 6063-T5 aluminium housing. Body section 17 x 35 mm, 15 mm drop, 1.5 mm aluminium wall. Rubber bulb seal. The mill does not name the seal compound. Supplied with two end plates of 28 x 62 mm and a 25 x 25 mm strike plate.

Standard lengths: 450, 600, 800, 915, 1000, 1200 mm. Each size can be cut down on site: 450 to 250, 600 to 450, 800 to 600, 915 to 700, 1000 to 800, 1200 to 1000 mm. The mill cuts to order from 250 to 3000 mm. Up to 450 mm it has one support, up to 1300 mm two, longer three. Sold by the bar; choose the length when ordering.