There are 5/10/50pcs
Material:
304 (A2-70) stainless steel
Size :
d(thread diameter) x L(thread length)
thread diameter: 
1mm / 1.2mm / 1.4mm / 1.7mm / 2mm/ 2.2mm / 2.6mm / 2.9mm
3.5mm / 3.9mm / 4.2mm / 4.8mm / 5.5mm / 6.3mm
Thread length: 3-50mm