What's the difference between these pumps, which one should i get??
http://www.petrastechshop.com/lad5smcin12v.htmlhttp://www.petrastechshop.com/swmcin12pu.html
http://www.petrastechshop.com/dadenlad5in1.html
http://www.petrastechshop.com/lad5smcin12v.htmlhttp://www.petrastechshop.com/swmcin12pu.html
http://www.petrastechshop.com/dadenlad5in1.html