Air Systems BB50 FK Replacement Filter Kit for Bb50 Series wc 20110 positioning and personnel material handling T4507 UAK positioning and personnel material handling Delta™ No Tangle™ design for added comfort and easy donning Dorsal web loop replaces back D ring reducing weight and electrical conductivity Adjustable non slip chest strap with buckle tightening easy to use Buckles the type parachute in the lower shoulder straps for quick and easy adjustment Leg straps with buckle fastening for quick and easy placement Plated hardware for corrosion resistance Air Systems BB50 FK Replacement Filter Kit for Bb50 Series Weight: 2 lb