Princeton Catalyst Silicone Blade 15mm Wide, Shape 05 Princeton Artist Brush Co. from $7.50 $17.75 Qty. Add to Cart SKU: PBB15-05 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Princeton Catalyst Silicone Blade, Long Handled, 15mm Wide, Shape 05. Tweet