Schaefer Stand-Up Swivel - Aluminum Block [704-62] Brand_Marpac The resulting vertical beam provides

The resulting vertical beam provides excellent echo returns for more accurate depth readings

NAC-2 VRF Core Pack - NAC-2

Marine grade Bronze main gear

Box Dimensions: 3"H x 4"W x 21"L WT: 1

and they prevent the risk of welding heat damage to any cables inside

Schaefer Stand-Up Swivel - Aluminum Block [704-62] Brand_Marpac The resulting vertical beam providesStand Up Swivel Aluminum Block Specifications: Sheave Dia. 2 2 8" (60 mm) Max Line 1 2" (13 mm) Diameter includes urethane base 3 3 8" (86 mm) Height 4 25 32" (120 mm) H2 2 15 32" (63 mm) Fastener Size (4),1 4" RH (6 mm) C C 1 11 16" (43 mm) SWL 2250 lbs (1020 kg) Weight Alum. 11. 7 oz. (332 g)