600pcs 12 size precision steel balls assortment kit contains:90pcs1mm 80pcs2mm 80pcs2.5mm 50pcs3mm 50pcs3.5mm 50pcs4mm 50pcs4.5mm 50pcs5mm 30pcs5.5mm 30pcs6mm 20pcs7mm 20pcs8mm. | Made of 304 Stainless Steel.Uniform size, high wear resistance, high precision， smooth surface, no burr, exquisite appearance. | Widely used in auto parts, motorcycles, bicycles bearings, casters, drawer slides etc. It can also be used as a mixing balls. Used to stir paint, nail polish, etc | The surface is coated with a small amount of grease to reduce friction when the bearing rotates and prevent corrosion and rust.Will reduce the damage to the machine and extend the service life. | Storage box packaging. steel balls are sorted by size and stored in compartments of the box. There are explanatory drawings. Easy to identify and store.

Model: 2.1 x 5.5mm Socket.The DC female seat is a copper pin, and the transmission is fast and stable.Pre-soldered Wires Length:150mm,red & black wire jackets indicate polarity;Rated load: 30V DC 10A. | 18AWG pre-welded wire, the red wire is connected to the positive electrode, and the black wire is connected to the negative electrode. It is generally used for 2.1*5.5mm interfaces. | The socket has the characteristics of environmental protection and flame retardant. The end of the power cord is tin-plated, which is easy to solder and install. | Widely used in household appliances, fitness equipment, medical equipment, toys , various electronic products,digital products, security monitors, audio-visual digital products. | Package Content:5Pcs DC Power Jack Cord Female Moun，5Pcs Waterproof Cover Cap