1、These standoff assortments are made of high quality brass and stainless steel for durable and long service life 2、Well manufactured surface without any bur, do no harm and feels quite comfortable 3、Waterproof, rust resistant and easy to clean, you can simply clean them with a cloth 4、This set includes Female-Female, Female-Male standoffs in different sizes, screws and nuts 5、Well protected and assorted in a resealable transparent plastic box for convenient carry and storage Description: A standoff is a fastener that is used to create space between two objects, often to properly position them. In the world of electronic components and electronic hardware, standoffs are typically used to space circuit boards, panels, doors or gears. Female-Female, Female-Male standoffs of different sizes, screws and nuts are all included in this set. Features: These standoff assortments are made of high quality brass and stainless steel for durable and long service life. Well manufactured surface without any bur, do no harm and feels quite comfortable. Waterproof, rust resistant and easy to clean, you can simply clean them with a cloth. This set includes Female-Female, Female-Male standoffs in different sizes, screws and nuts. Well protected and assorted in a resealable transparent plastic box for convenient carry and storage. Specifications: Material: Brass and 304 stainless steel Set B: Female-Female Standoffs: 25pcs x M3*5mm 25pcs x M3*10mm 25pcs x M3*15mm 25pcs x M3*20mm M3*6mm Screws x 50pcs Male-Female Standoffs: 25pcs x M3*5+5mm 25pcs x M3*10+6mm 25pcs x M3*15+6mm 25pcs x M3*20+6mm M3 Nuts x 50pcs Box Size: 17 x 9.5 x 2.3cm / 6.69 x 3.74 x 0.9" Set C: Female-Female Standoffs: 25pcs x M2*4mm 25pcs x M2*6mm 25pcs x M2*8mm 25pcs x M2*10mm M2*4mm Screws x 50pcs Male-Female Standoffs: 25pcs x M2*4+3mm 25pcs x M2*6+3mm 25pcs x M2*8+3mm 25pcs x M2*10+3mm M2 Nuts x 50pcs Box Size: 13 x 6.5 x 2.3cm / 5.11 x 2.56 x 0.9" Package Includes: 1 set x Standoff Assortment