Injection hook Material:Polymer and nylon Width:10mm,16mm,20mm,25mm,30mm,38mm,50mm,100mm,150mm... Color:black,white,red,grey. Injection hookFeatures ... style hooks:1#,2#,3#.3) The appearance & height of hook is different.4) The Adhesive power is various as the ... different height of hook.5) Density of hook: about 60-100 pc per square centimetre.6 ...