Schaefer Single Ball Bearing Block [506-05] Marine Safety | Safety Lights CP-30 is identical to CP-20

CP-30 is identical to CP-20 except that it offers externally replaceable motor brushes

Charging is further regulated with the optional DC-BTS-A-C Battery Temperature Sensor

reverse polarity protection

Number of Terminal Studs: 2

Schaefer Single Ball Bearing Block [506-05] Marine Safety | Safety Lights CP-30 is identical to CP-20Single Ball Bearing Block Single block with aluminum cheeks and ball bearing sheave. Delrin ball bearing sheave ensures low friction operation. Swivel head may be locked in place to avoid twist. Specifications: Sheave Diameter 2" (51mm) Thickness 15 16" (24mm) Width 2 1 8" (54mm) Length 4 13 32" (112mm) SWL 1500 lbs. (680kg) Weight 5oz. (142g) Max Line 7 16" (11mm)