Series 19 I-Beam Car - Adjustable Track Stop - Spring Loaded - 25mm(1")Track Fastenings: To suit 5mm(3/16") countersunk fasteners at 100mm(3-15/16") centres.Stop Holes: - 50mm (1-31/32") centres.Track is supplied with RC7250-INS insulating inserts to eliminate corrosion between track and fasteners Minimum Curve RadiusFor 51mm(2") car Min horizontal 'A' curve radius = 400mm (15-3/4"). Min horizontal 'B' curve radius = 400mm (15-3/4").For 86mm (3-3/8") car Min horizontal 'A' curve radius = 1200mm (47-1/4"). Min horizontal 'B' curve radius = not suitable.For 105mm (4-3/16") car Min horizontal 'A' curve radius = 400mm (15-3/4"). Min horizontal 'B' curve radius = not suitable.Applications:Mainsheet and self-tacking jib travellers on dinghies and catamaransMainsheet systems on boats to 9M (28')Materials:Stainless body & plunger