Detailed introduction

Material:Aluminium

Diameter: 5mm*7mm*7mm;4.1mm*6.1mm*8mm and so on

Color:black,red,yellow,green .....at your option

Weight:2 or 3gram(about 30~60grain)

Length:4.5cm or 6.3cm

The inserts are used for broadheads which can change different archery arrowheads

you do want.