The Warehouse O-ring Kit provides you with a large on hand selection of O-rings to ensure continuous operation. No other O-ring kit provides this broad assortment in one kit; 1,110 O-rings in these 150 different sizes: -001 thru -046, -110 thru -151, -210 thru -237, -325 thru -338, and -901 thru -932. Each size is individually packaged in heavy duty Ziploc poly bags to protect against environmental exposure and contamination. All packages are then stored in a sturdy styrene cabinet with pull-out drawers for easy access to parts included card shows size, dimensions, and drawer location for each ring. The 1110 x 150 O-Ring Warehouse is provided in a high quality 70 durometer nitrile (Buna N) material, except sizes -901 thru -932, which are 90 durometer nitrile.