PRO-LINE Micro-Hybrid Composite A3.5 – 4.5gm Refill Syringe Only #001-401 115943 por | Jul 20, 2026A3.5 Syringe – 4.5grs. A Light cured resin based composite used for all types of cavity preparations. Easy to mold, sculpt, and polish to a high luster. Has high compressive strength as well as low shrinkage and resists staining.