1.High Quality: 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 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.