The Shiga Insect Needle is the highest quality stainless steel insect needles from Shiga Insect Penetration company, which is necessary for creating insect specimens. The head needle has a small poch on the hand for easy penetration. Please choose the thickness according to the solid specimen size you are looking for. Contents: 100 head cigarette insects needles Size Chart No. 00 Size: Length 1.6 inches (41 mm), Thickness 0.01 inches (0.3 mm), Size 0: Length 1.6 inches (41 mm), Thickness 0.02 inches (0.35 mm), Size 1.6 inches (41 mm), Thickness 0.5 mm), Size 5. Length: 1.6 inches (41 mm). Size 6: Length 1.6 inches (41 mm), Thickness 0.02 inches (0.65 mm). *This is a dedicated needle for insect specimens, so please do not use other than insect specimens.