Grease Fitting Cap Kit - 300 Piece Assortment. Made in The USA! 300 Piece American Made Grease Fitting Cap Kit. Caps Included: Red (50), Blue (50), Black (50), Green (50), Yellow (50), White (50) Made In The USA! Polyethylene caps protect fittings from corrosion & contaminants Packaged in a Heavy Duty Container with Adjustable Columns & Locking Lid Caps include a integral retaining ring to hold the cap in place during servicing