8750 Kit. Includes six lengths of aluminum track 7'7" long each, one length of track 25" long, one 4" removal gate, seven track joints, two end stops. Total length = 47'-10". 8750 track accepts 7/8" flat slides. Removable track gate allows easy loading/unloading of mainsail. Works with Schaefer Battslide slide #803. Appropriate for most boats up to 45'.