... Model: Single Anchor & Multi Anchor8. Parts: Anchor,Wedges,Bearing Plate,Spiral Bars,Ducts,Coupler9. Anchor: Round10. Anchor Ring: φ117*4711. ... 162*100*φ7813. Ducts: Plastic & Steel Strip14. Spiral Bars: 160*φ12*5015. Spiral Bars Laps: 416. Bellows ID: φ7017. Mounting ... Parts: anchor ring/plate, wedge, base plate, spiral bar, bellow/corrugated pipe etc.7. Function: Prestressing method is widely used ...