Conibars don't come in #1 1/2. Here are the most popular sizes
110 = 4" opening 1 spring
120 = 4" opening 2 springs
160 = 6" onening 2 springs (Very good **** trap)
220 = 7" opening 2 springs (Check Regs. before setting on dry land)
280 = 8" opening (Very good Otter trap/will work on most Beaver)
330 = 10" opening( Best Beaver trap made)

110 = 4" opening 1 spring
120 = 4" opening 2 springs
160 = 6" onening 2 springs (Very good **** trap)
220 = 7" opening 2 springs (Check Regs. before setting on dry land)
280 = 8" opening (Very good Otter trap/will work on most Beaver)
330 = 10" opening( Best Beaver trap made)