Lasdrop 1-34 Gen II Shaft Seal The Gen II offers exclusive features that make it the premier shaft seal on the market with the culmination of more than a quarter century of experience in shaft seal design. The Gen II offers a unique ball-bearing drive system that allows the seal ring to float and remain in constant contact with the carbon graphite seal surface, resulting in a seal thats impenetrable to water. The Gen II uses a 316-marine grade stainless steel spring to provide pressure to the se