Harken%20Tracks%20are%20built%20of%20tough%206061-T6%20aluminum%20that%20is%20Hardkote-anodized%20black%20with%20Teflon%26reg%3B%20impregnation%20for%20durability.Part%20Number%3A%20453.9.5%20Specifications%20%20%20%20%26nbsp%3B%20Imperial%20Metric%20%20%20Length%209%201%2F2%22%200.24%20m%20%20%20Mounting%20Hole%20Spacing%203%22%2076%20mm%20%20%201st%20Hole%201%203%2F8%22%2034%20mm%20%20%20Weight%201.22%20oz%2035%20gr%20%20%20Fasteners%20%23%2010%205%20mm%20%20%20%20Need%20help%20to%20design%20your%20Harken%20system%20-%20take%20a%20look%20here%20for%20the%26nbsp%3BHarken%20System%20Guides%20and%20Drawings%20Or%20perhaps%20you%20need%20some%20other%20information%20(load%20calculators%2C%20block%20selectors%2C%20service%20instructions%20or%20manuals)%3F%26nbsp%3B%26nbsp%3B%20Take%20a%20look%20here%20for%20all%20the%20official%26nbsp%3BHarken%20Support%20Information%20%26nbsp%3B