2-1/2" alpha brush. Bristles are a unique synthetic blend featureing Micro Tip filaments for the finest finish with all paints. Features: Firm, full formulation for smooth paint flow and increased production, stainless steel ferrule, and sealed maple wood Lindbeck handle. unique synthetic blend featureing Micro Tip filaments for the finest finish with all paints. Features: Firm, full formulation for smooth paint flow and increased production, stainless steel ferrule, and sealed maple wood Lindbeck handle. No. 4231-2: Size: 2", length 2-11/16", thickness 9/16" angle No. 4231-2-1/2": Size: 2-1/2", length 2-15/16", thickness 5-8" angle No. 4231-3: Size: 3", length 3-3/16", thickness 11/16" angle No. 4232-2: Size: 2", length 2-11/16", thickness 9-16", flat No. 4232-2-1/2: Size: 2-1/2", length 2-15/16", thickness 5/8", flat No. 4232-3: Size: 3", length 3-3/16", thickness 11/16", flat