BUSY-CORNER 166 Pieces Scuba Oring Assortment Kit(NBR90) APPLICATION: Use for dive hoses ring, diving,dive gear equipment etc. 90 Durometer Nitrile is the recommended material for your scuba needs when you are not diving with a Nitrox mixture. SIZE CHART: QTY-AS568 SIZE I.D. TYPICAL USE 15 -003 1/16" High Pressure Hose/Swivel Seal 15 -010 1/4" Low Pressure Hose/2nd Stage Reg/Cyl Valve Stem 15 -011 5/16" Low Pressure Port/Hose, Hose Adapters 15 -012 3/8" High Pressure Port/Hose, Gauge Hose 15 -013 7/16" Large Low Pressure Port/Hose, Piston Seat Seal 15 -014 1/2" Standard Yoke/Tank Regulator 15 -015 9/16" High Pressure Hose/Swivel Seal 15 -022 1" Regulator Piston Ring/Body Plug Seal 15 -111 7/16" Small DIN Regulator Valve 15 -112 1/2" Standard DIN Regulator Valve 10 -116 3/4" Small Tank Neck, Genesis 3500 Cylinders 6 -214 1" Large Tank Neck