NRG corrosion resistant Non-Metallic H78 series sprockets are split as standard for ease of installation and removal. While typically used for drive and driven sprockets, in smaller tanks H78 series gears are ideal collector sprockets when used with H78 chain and attachments. Available solid or in c-hub, b-hub, or a-plate configurations, H78 sprockets come in a wide range of tooth sizes (see below). NRG's H78 sprockets are offered in UHMW-PE or Nylon-6 materials, with 304 or 316 ss hardware. UHMW-PE segmental sprocket teeth mounted on cast iron bodies or all cast iron sprockets are also available. No. of Teeth Pitch Diameter (in) No. of Teeth Pitch Diameter (in) No. of Teeth Pitch Diameter (in) 5 4.44 22 18.33 39 32.42 6 5.22 23 19.16 40 33.25 7 6.01 24 19.99 41 34.08 8 6.82 25 20.77 42 34.91 9 7.63 26 21.59 43 35.74 10 8.44 27 22.42 44 36.57 11 9.26 28 23.30 45 37.40 12 10.08 29 24.13 46 38.23 13 10.90 30 24.96 47 39.06 14 11.72 31 25.79 48 39.89 15 12.55 32 26.62 49 40.72 16 13.37 33 27.45 50 41.55 17 14.20 34 28.28 51 42.38 18 15.02 35 29.11 52 43.21 19 15.85 36 29.94 53 44.04 20 16.68 37 30.76 54 44.87 21 17.50 38 31.59 55 45.70