The neck size is 18mm. Volume is 50ml. Color is amber Material glass Color  blue/clear/amber/green/frosted Cap type screw dropper cap/childproof cap/tamper proof cap/pump cap Capacity 5ml,10ml ,15ml 20ml ,30ml ,50ml ,100ml ,120ml     Neck Height Diameter Weight 5ml 18mm 50mm 22mm 22g 10ml 18mm 58mm 25mm 27.5g 15ml 18mm 65mm 29mm 33g 20ml 18mm 71mm 28.5mm 35g 30ml 18mm 78mm 33mm 48g 50ml 18mm 92mm 39mm 55g 100ml 18mm 112mm 44.5mm 95g …