The Viper is a Heavy Tackle lure with 12" sized skirt saddles. The head shape has a cupped/inverted nose with a mostly flat but reverse tapered head, almost with a very slight doorknob style taper.
BOM Skirt Size 602.
From "Bonze" Fleet on the Viper:
"The smooth straight running action of this lure will fool even the most wary fish into making a fatal mistake! A very easy to run lure that is great in the longer positions. Skirted Length: 400mm / 15.75” Hook Size: 10/0 -11/0 Leader Size: 400lb – 600lb."
This particular head is from their "Custom" lineup with a silver flashy rainbow-iridescent patterned wrap along the sides of the red pearl insert with a set of black, rainbow, and red Bonze eyes. Skirted in red with black bars/white with holographic glitter and a red lateral line.