Especificaciones:

• Uso: optical instruments
• Número de modelo: B270
• Material: optical glass B270
• edge: protection chamfer
• warmming: before pay pls contact with me
• thickness: 0.3-50mm
• tempered: depend your choice
• Tamaño: 33mm
• surface: 40/20
• surface: no bubbles and hairlines
• shape: round
• polishing: both two sides
• Origen: CN(Origen)
• material: B270
• color: clear