This is the JBL Carbine Series Aluminum Speargun 1 inch Barrel Spearfishing Features: Aircraft grade aluminum barrel 9/32 heat treated stainless steel spearshaft Powered by 1/2" Nitro Bands Stainless steel trigger mechanism Integrated safety American Made The Mini versions have only 1 notch on the shaft and 1 band. The larger versions have 2 notches on the shaft and 2 bands. Specs: The Mini - Length W/O Shaft: 16" Spearhead: N/A Shaft: 16 x 9/32" with Point, 1.5" Standard Flopper and 6mm threads (716-SB) Power Source: One 8 x 1/2" Nitro Band (608) Band Stretch: 11" Reach: 6 Mini Carbine - Length W/O Shaft: 23" Spearhead: N/A Shaft: 24 x 9/32" with Point, 1.5" Standard Flopper and 6mm threads (724-SB) Power Source: One 14 x 1/2" Nitro Band (614) Band Stretch: 17" Reach: 9 Carbine - Length W/O Shaft: 33" Spearhead: Stainless Twin Barb Rock Point (847) Shaft: 33 x 9/32" with 6mm threads (733-SB) Power Source: Two 20 x 1/2" Nitro Bands (620) Band Stretch: 28" Reach: 12 Super Carbine - Length W/O Shaft: 41" Spearhead: Stainless Twin Barb Rock Point (847) Shaft: 41 x 9/32" with 6mm threads (741-SB) Power Source: Two 22 x 1/2" Nitro Bands (622) Band Stretch: 35" Reach: 21 Carbine series spearguns are constructed of aerospace grade aluminum and feature high-strength stainless steel shafts and triggers. They&';re powered by 1/2" Nitro Bands and feature a low-profile pistol grip handle that makes for easy target acquisition. So, if you want a speargun that will bring home plenty of fish without breaking the bank, the Carbine is the perfect choice."