Automatic door bottom, mortised, 14 x 34 mm aluminium, 15 mm drop, fin seal, square 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 is a square brass block. 6063-T5 aluminium housing. Body section 14 x 34 mm, 15 mm drop, 1.5 mm aluminium wall. Multi-fin seal. The mill does not name the seal compound. Supplied with two end plates of 22 x 60 mm and a 25 x 25 mm strike plate.

Standard lengths: 450, 600, 700, 800, 915, 1000, 1100, 1200 mm. Each size can be cut down on site: 450 to 250, 600 to 450, 700 to 550, 800 to 650, 915 to 750, 1000 to 850, 1100 to 950, 1200 to 1050 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.