Because seconds count, the Airflo Depthfinder Big Game fly lines are fast-loading, 30&'; heads that quickly gets you in the game. And its 300 to 700 grain head drives your fly immediately to depth while the intermediate running line helps keep it there. An extremely low-stretch, 50 lb Power Core means positive hook sets - even at depth. An extremely low-stretch, 50 lb Power Core means positive hook sets - even at depth. Total Head Length 30 ft Total Length 150ft Intermediate Running Line w/ Extra Fast Sinking Head LINE WEIGHT DENSITY COLOR FULL HEAD WEIGHT CORE 300 GRAIN 7ips Black/ Fl Orange 300gr / 20gm 42LB - Braid 400 GRAIN 7.5ips Black/ Olive 400gr / 26gm 50LB - Braid 500 GRAIN 7.5ips Black/ Dark Green 500gr / 32gm 50LB - Braid 700 GRAIN 8ips Black/ Dark Blue 700gr / 44.5gm 50LB - Braid