General description 100Pcs Butterfly Needle Vacuum Holder Safety Blood Collection Set Draw Scalp Vein is designed for medical and scientific use. This set includes 100 needle holders made from durable plastic, ensuring safety and reliability during blood collection procedures. Technical specifications Color: Transparent Material: Plastic Package Contents: 100 Needle Holders Measurement allowed error: +/- 1-3cm Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.