Davis Instruments Shockles LineSnubber - Blue. Progressive tension design with internal stretch limiter. Features of Davis Instruments Shockles LineSnubber Shockles absorb shock loads on mooring lines making the lines last longer Use on any boat Safely absorbs sudden shock loads Length: 20" (62 cm) Color: Black Package Contents: Davis Instruments Shockles LineSnubber Davis Instruments 2400: Shockles LineSnubber - Blue