1.High Quality: Resistant To Heat,Low/High Temperature,Air,Water 2.Multi Size: Includes 32 Of The Most Commonly Used Sizes Ranging From 3 X 1.5, 4 X 2, 5 X 2, 7 X 1.5, 10 X 1.5, 13 X 1.5, 10 X 2.5, 11 X 2.5, 13 X 2.5, 14 X 2.5, 16 X 2.5, 18 X 2.5, 19 X 2.5, 21 X 2.5, 22 X 2.5, 18 X 3.5;20 X 3.5, 22 X 3.5, 23.5 X 3.5, 25 X 3.5, 26.5 X 3.5, 28 X 3.5, 30 X 3.5, 31 X 3.5, 33 X 3.5, 34.5 X 3.5, 36 X 3.5, 38 X 3.5, 41 X 3.5, 44 X 3.5, 47 X 3.5, 50 X 3.5mm,Can Meet Almost All Your Needs. 3.Wide Application:Use For Plumbing,Machinery,Hydraulic & Pneumatic Repairs,Water Faucet, Garages,Workshops,Cars,Doors And , Electrical Appliances, Bearings, Pumps, Idlers, Etc. 4.Handy Packing: Comes With A Heavy Duty Storage Case That Keeps Each Size O Rings Separated And Organized,That Makes More Convenient To Carry, Select And Collect. Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:Plastic Package Contents: 1 Set x Red Box (Including 419PCS O-Ring) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.