Fangrui Product Details [suitable For Bottleneck Size 24-410]-- Mainly Used In The Market For 2 Oz Acrylic Paint Bottles. May Fit Other 1 Oz, 4 Oz And 8 Oz Bottleneck Sizes 24-410. You Can Change The Cap Directly To Switch Different Types Of Needles, So You Dont Have To Change The Whole Bottle, Which Is Very Convenient To Use And Saves A Lot Of Trouble. With Just A Twist, The Needle Can Be Easily Attached To The Bottle, Making It Easy To Use And A Must-have Tool For Handmade Projects. [two Needle Types]-- Equipped With Round Needles And Flat Needles, These Two Types Are The Most Suitable For Coloring. Each Needle Has A Silicone Cap That Effectively Prevents The Liquid From Drying Out. Round Needles Are More Used For Drawing Lines, While Flat Needles Can Be Used For Coloring Large Areas. For Different Scenarios And Use Needs, You Can Choose Different Needle Use. Suitable For Fresher Lines And More Complex Details In Automotive Applications. [high Quality Material]-- Our Paint Covers Are Made Of High Quality Pe Plastic, W