e-ON® coated sectional matrices compliment the e-ON® sectional matrix system. They are made of premium stainless steel and offers tight contacts. 3.5mm length, gray. Refill, pack of 100 Coated Matrix Band 3.5mm, Gray- 6045-905 Coated Matrix Band 4.5mm, Red- 6045-941 Coated Matrix Band 5.5mm, Blue- 6045-987 Coated Matrix Band 6.5mm, Green- 6046-011 Coated Matrix Band 7.5mm, Black- 6046-039