A pack of 10 pieces of the 3D3PBLACK 15 x 21 mm SPST On/Off Boat Rocker Switch, model KCD1 KCD1101, rated 6A 250V. The 3D3PBLACK finish and compact 15 x 21 mm form factor are designed for easy panel integration while providing reliable singlepole, singlethrow ON/OFF control. Key benefits Compact panel fit: 15 x 21 mm mounting size supports tight installation spaces without sacrificing performance. Simple ON/OFF control: SPST operation delivers straightforward, reliable switching for singlecircuit applications. Strong electrical rating: Rated up to 6A at 250V, suitable for powering common boat accessories and auxiliary circuits. Stocked in a 10piece pack: Ensures readily available replacements and convenient inventory for multiple installations. Clean, professional appearance: Black 3D3PBLACK finish blends with standard dashboards and panels on boats and other equipment. Model consistency: KCD1 KCD1101 specification ensures compatibility with existing installations that call for this form factor and rating. Key attributes Functionality: SPST On/Off switch for singlepole circuits. Compatibility: Suitable for panel mounting in systems that use 15 x 21 mm cutouts; rated up to 6A at 250V. Size: 15 mm by 21 mm mounting footprint. Color/finish: Black, 3D3PBLACK design. Performance: Reliable on/off switching with a 6A/250V rating. Packaging: 10 pieces per pack. Model references: KCD1 and KCD1101. Use cases Boat lighting switch: Control cabin lights or navigation lighting from a compact, panelside position. Marine accessory power switch: Activate or deactivate devices such as bilge pumps, pumps, or other 12V24V accessories (within the practical ratings for the circuit) from a marine panel. Small appliance or panel signoff: worn switches in compact control panels on boats, RVs, or caravans where a 15 x 21 mm SPST switch is appropriate. Notes Ensure wiring and mounting conform to the 15 x 21 mm cutout specification and respect the 6A 250V rating for each circuit. This description reflects the product's stated brand, specifications, model, and features as provided. No additional details have been added.