Safer than mercury switches, this switch utilizes a mercury-free rolling ball mechanism and includes an exclusive anti-spike feature to prevent the rapid on/off cycling encountered with some switches. Made of rugged thermoplastic. Universal design works with all 12V, 24V and 32V bilge pumps. Switch Type: Rolling-ball float Maximum Amperage: 15A Dimensions: 4"L x 3"W x 2"H Warranty: Three years