Fillets or frame spacers are used to give depth between the acrylic and the artwork. SmallCorp manufactures acrylic, aluminum, and lightweight (aluminum with archival foam) fillets. Our aluminum channel fillets are heavy-duty and screw to our TIG7 and TIG8 frames. Aluminum and lightweight fillets are powdercoated to match SmallCorp aluminum frames or can be a complementary color. Fillets are fitted to frames when ordered together.