Material: jis c3604 brass Weight: 60g. (+, - 3g.) Technique: lathing by cnc lathing machine Shape: bullet cyllinder shape with central tube hole to thread and tie the curtain cord. Function: weighting the roman blind curtain Note: this dimension is our typical brass weight type, however, should your require other dimension, just give us engineering drawing and we can customized all dimension all weight all design to fit your usage function. We have both forging and lathing machine to tailor made any brass part for you in a very competitive price with great quality. Size: hight 37 mm. Od: 18mm id: 9mm and on the other side Od: 12mm id: 6.5 mm You are welcome to contact us to provide you our engineering drawing for your consideration.